Harvard University Herbaria & Libraries

Index of Botanical Specimens

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FH: 01141379 Alectoria bicolor (Ehrhart) Nylander Canada: Yukon Territory [data not captured] R. S. Williams 1898-5-24
FH: 01141400 Alectoria fremontii Tuckerman USA: Montana [data not captured] R. S. Williams 1893-4
FH: 01141401 Alectoria fremontii Tuckerman USA: Montana [data not captured] R. S. Williams 1897-5-8
FH: 01141487 Alectoria jubata implexa (Hoffmann) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1898-10-2
FH: 01141384 Alectoria nitidula (Th. Fries) Vainio Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-2
FH: 01141387 Alectoria ochroleuca (Hoffmann) A. Massalongo Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-2
FH: 01141391 Alectoria oregana Tuckerman USA: Montana [data not captured] R. S. Williams 1893-4-27
FH: 01141494 Alectoria thrausta Acharius Canada: Yukon Territory [no additional data] R. S. Williams 1898-4-6
FH: 00418482 Arthonia patellulata Nylander USA: Alaska [data not captured] R. S. Williams 1898

FH: 00419846 Bilimbia sabuletorum (Schreber) Arnold USA: Montana [data not captured] R. S. Williams 1893

FH: 00419847 Bilimbia sabuletorum (Schreber) Arnold USA: Montana [data not captured] R. S. Williams 1893

FH: 00408456 Bryoria abbreviata (Müller Arg.) Brodo & D. Hawksworth USA: Montana [data not captured] R. S. Williams 1893

FH: 00408457 Bryoria abbreviata (Müller Arg.) Brodo & D. Hawksworth USA: Montana [data not captured] R. S. Williams 1893

FH: 00408532 Bryoria fremontii (Tuckerman) Brodo & D. Hawksworth USA: Montana [data not captured] R. S. Williams 1893

FH: 00408533 Bryoria fremontii (Tuckerman) Brodo & D. Hawksworth USA: Montana [data not captured] R. S. Williams 1893

FH: 00408535 Bryoria fremontii (Tuckerman) Brodo & D. Hawksworth USA: Montana [data not captured] R. S. Williams 1893

FH: 00408536 Bryoria fremontii (Tuckerman) Brodo & D. Hawksworth USA: Montana [data not captured] R. S. Williams 1893

FH: 00913943 Buellia papillata (Sommerfelt) Tuckerman Canada: Yukon Territory [no additional data] R. S. Williams
FH: 00888003 Buellia scabrosa (Acharius) A. Massalongo Canada: Yukon Territory [no additional data] R. S. Williams
FH: 00888053 Candelariella vitellina (Hoffmann) Müller Argoviensis Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 83 1899-5
FH: 00438767 Lecania naegelii (Hepp) Diederich & van den Boom Canada: Yukon Territory [data not captured] R. S. Williams 1899-5-7

FH: 00302510 Lecidella sp. USA: Alaska Lake Lindeman R. S. Williams 1898-5-9
FH: 00913869 Leptogium saturninum (Dickson) Nylander Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 1899-4-3
FH: 01139585 Lobaria linita (Acharius) Rabenhorst Canada: Yukon Territory [data not captured] R. S. Williams
FH: 00454419 Mycoblastus affinis (Schaerer) T. Schauer USA: Alaska [data not captured] R. S. Williams 1899

FH: 01139376 Nephroma arcticum (Linnaeus) Torssell Canada: Yukon Territory [data not captured] R. S. Williams 1899-5
FH: 01139383 Nephroma helveticum Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-6
FH: 01139663 Pannaria pezizoides (Weber) Trevisan Canada: Yukon Territory [data not captured] R. S. Williams 1898-3-27
FH: 00470729 Peltigera venosa (Linnaeus) Hoffmann USA: Montana [data not captured] R. S. Williams

FH: 00470730 Peltigera venosa (Linnaeus) Hoffmann USA: Montana [data not captured] R. S. Williams 1893-4

FH: 01139460 Peltigera venosa (Linnaeus) Hoffmann USA: Montana [data not captured] R. S. Williams 1893-4
FH: 01141545 Pilophorus acicularis (Acharius) Th. Fries Canada: Yukon Territory [data not captured] R. S. Williams 1898-3
FH: 00478006 Rhizoplaca chrysoleuca (Smith) Zopf USA: Montana [data not captured] R. S. Williams 1893-5

FH: 00478009 Rhizoplaca chrysoleuca (Smith) Zopf USA: Montana [data not captured] R. S. Williams 1893-5

FH: 00492704 Umbilicaria hyperborea (Acharius) Hoffmann USA: Montana [data not captured] R. S. Williams 1893-4

FH: 00492705 Umbilicaria hyperborea (Acharius) Hoffmann USA: Montana [data not captured] R. S. Williams 1893-4

FH: 01140452 Umbilicaria pustulata papulosa (Acharius) Tuckerman Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-3
FH: 00493218 Umbilicaria vellea (Linnaeus) Hoffmann USA: Montana [data not captured] R. S. Williams 1893-4

FH: 00493228 Umbilicaria vellea (Linnaeus) Hoffmann USA: Montana [data not captured] R. S. Williams 1893-4

Acanthaceae
A: 00257359 Strobilanthes Blume Philippines: Benguet Between Baguio and Sablon, Northern Luzon R. S. Williams 1368 1904-11-19
A: 00257359 Strobilanthes pluriformis C. B. Clarke Philippines: Benguet Between Baguio and Sablon, Northern Luzon R. S. Williams 1368 1904-11-19
Acarosporaceae
FH: 00437436 Glypholecia scabra (Persoon) Müller Arg. USA: [data not captured] R. S. Williams 1890

Actinidiaceae
A: 01684549 Saurauia sp. Philippines: Bataan [no additional data] R. S. Williams 3030

GH: 01684481 Saurauia sparsiflora Elmer Philippines: Benguet Mount Santo Tomas R. S. Williams 1333 1904-10-30

GH: 01684551 Saurauia zamboangensis Merrill Philippines: Mindanao: Sax River, Prov. Zamboanga R. S. Williams 2167 1905-2-14

Amblystegiaceae
FH: 00539542 Cratoneuron commutatum falcatum (Bridel) Mönkemeyer USA: Montana [data not captured] R. S. Williams 1895-10-4

FH: 00794211 Drepanocladus aduncus capillifolius (Warnstorf) Mönkemeyer USA: Montana [data not captured] R. S. Williams 1895-6

FH: 00839117 Hygrohypnum molle bestii (Renauld & Bryhn) Grout USA: Montana [data not captured] R. S. Williams 1891-9-17

NEBC: 00839210 Hygrohypnum ochraceum (Turner ex Wilson) Loeske USA: Massachusetts Cheshire: [no additional data] R. S. Williams 1901-4-20
Anacardiaceae
A: 02279352 Buchanania arborescens (Blume) Blume Philippines: Mindanao Island: Davao R. S. Williams 2726 1905

GH: 02279434 Buchanania arborescens (Blume) Blume Philippines: Zamboanga del Sur Sax River R. S. Williams 2363 1905-2-21

GH: 02279976 Dracontomelon dao (Blanco) Merrill & Rolfe Philippines: Davao del Sur Santa Cruz R. S. Williams 2860 1905-5-18

GH: 02280447 Koordersiodendron pinnatum (Blanco) Merr. Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 647 1904-3-2

Annonaceae
GH: 02612042 Anaxagorea luzonensis A. Gray Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 10 1903-10-29

A: 02612054 Anaxagorea radiata C.B.Rob. Philippines: Jolo R. S. Williams 3108 1905

GH: 00039265 Cyathocalyx acuminatus C. B. Robinson Philippines: Sax River, Province Zamboanga, Mindanao Isla... R. S. Williams 2143 1905-2-8

GH: 00039466 Mitrephora williamsii C. B. Robinson Philippines: Sax River, Province Zamboanga, Mindanao Isla... R. S. Williams 2188 1905-3-3

GH: 00039511 Orophea cumingiana S. Vidal Philippines: Sax River, Province Zamboanga, Mindanao Isla... R. S. Williams 2311 1905-2-26

GH: 00039511 Orophea williamsii Merrill Philippines: Sax River, Province Zamboanga, Mindanao Isla... R. S. Williams 2311 1905-2-26

Apiaceae
GH: 00077792 Sanicula apiifolia Greene USA: Montana Tea Kettle Mountain R. S. Williams 1894-6-21

GH: 00077792 Sanicula graveolens Poeppig ex de Candolle USA: Montana Tea Kettle Mountain R. S. Williams 1894-6-21

Apocynaceae
GH: 02116920 Ichnocarpus frutescens (Linnaeus) W. T. Aiton Philippines: Bataan Mt. Mariveles, Prov. Bataan, Central Luzon; ... R. S. Williams 654 1904-3-7

A: 02116919 Ichnocarpus frutescens (Linnaeus) W. T. Aiton Philippines: Bataan Mt. Mariveles, Prov. Bataan, Central Luzon; ... R. S. Williams 654 1904-3-7

GH: 02381070 Ochrosia glomerata (Blume) F. Mueller Philippines: Bataan Lamao River, Mt. Mariveles, Central Luzon R. S. Williams 706 1904-3-15

GH: 02381051 Ochrosia glomerata (Blume) F. Mueller Philippines: Bataan Lamao River, Mt. Mariveles, Central Luzon R. S. Williams 706 1904-3-15

A: 02382071 Parsonsia alboflavescens (Dennstedt) Mabberley Philippines: [no additional data] R. S. Williams 3019

GH: 02382061 Parsonsia alboflavescens (Dennstedt) Mabberley Philippines: Bataan Lamao Riv., Mt. Mariveles, Central Luzon R. S. Williams 243 1903-12-3

GH: 00093142 Tabernaemontana macrocarpa Jack Philippines: Sax River, Prov. Zamboanga, Mindanao Island R. S. Williams 2179 1905-2-17

GH: 00093142 Tabernaemontana megacarpa Merrill Philippines: Sax River, Prov. Zamboanga, Mindanao Island R. S. Williams 2179 1905-2-17

GH: 02372962 Tabernaemontana pandacaqui Poiret Philippines: Davao del Sur Santa Cruz: Davao, S. E. Mindanao R. S. Williams 2749 1905-4-18

Araceae
GH: 01634772 Amorphophallus sp. Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 385 1903-12-30

GH: 01634870 Anadendrum sp. Philippines: Mindanao: Sax River, Prov. Zamboanga R. S. Williams 2364 1905-2-16

GH: 01627371 Lysichiton americanum Hultén & H. St. John USA: Montana Columbia Falls R. S. Williams 1895-6-5

GH: 01630023 Pothos cylindricus C. Presl Philippines: Davao del Sur Santa Cruz: [no additional data] R. S. Williams 2937 1905-6-6

GH: 01630044 Pothos philippinensis Engler Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 486 1903-1-19

GH: 01630600 Schismatoglottis sp. Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 244 1903-10-31

GH: 01630705 Scindapsus sp. Philippines: Davao del Sur Santa Cruz: [no additional data] R. S. Williams 2812 1905-4-29

Araliaceae
GH: 02456305 Aralia bipinnata Blanco Philippines: Benguet Baguio R. S. Williams 1145 1904-6-24

GH: 02456302 Aralia bipinnata Blanco Philippines: Benguet Baguio R. S. Williams 1030 1904-10-7

GH: 02456296 Aralia bipinnata Blanco Philippines: Benguet Baguio R. S. Williams 1030 1904-10-7

A: 02456528 Arthrophyllum ahernianum Merrill Philippines: Benguet Salban R. S. Williams 1557 1904-11-18

GH: 02522215 Schefflera benguetensis Merrill Philippines: Benguet Baguio R. S. Williams 1164 1904-6-21

GH: 02522222 Schefflera blancoi (Blanco) Merrill Philippines: Benguet Trinidad R. S. Williams 1304 1904-9-28

GH: 02522331 Schefflera elliptica (Blume) Harms Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 903 1904-4-3

GH: 02522425 Schefflera microphylla Merrill Philippines: Benguet Mount Santo Tomas R. S. Williams 1019 1904-10-12

A: 02522437 Schefflera oblongifolia Merrill Philippines: Benguet Trinidad R. S. Williams 1205 1904-9-28

Araucariaceae
A: 02469019 Agathis dammara (Lambert) Richard Philippines: Mindanao: Mt. Apo. R. S. Williams 2555 1905

Arecaceae
A: 02426589 Calamus sp. Philippines: Davao del Sur Todaya, Mt. Apo. R. S. Williams 2610 1905

GH: 02426748 Caryota cumingii Loddiges ex Martius Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 571 1904-2-10

Asclepiadaceae
A: 02478994 Telosma procumbens Merrill Philippines: Davao del Sur Santa Cruz: [no additional data] R. S. Williams 2895 1905

Aspleniaceae
GH: 02467435 Asplenium drepanophyllum Kunze Bolivia: Isapuri R. S. Williams 1098 1901-10-3

GH: 02405970 Asplenium epiphyticum Copeland Philippines: Mindanao Island: Sax River, Prov. Zamboanga R. S. Williams 2217 1905-2-3

GH: 02405999 Asplenium haenkei Copeland Philippines: Mindanao: Sax River, Prov. Zamboanga R. S. Williams 2292 1905-3-7

GH: 02404222 Asplenium sp. Philippines: Mindanao: Todaya, Mt. Apo, SE Mindanao R. S. Williams 2514 1905-4-1

Asteraceae
GH: 02251643 Ainsliaea reflexa Merrill Philippines: Benguet Mount Santo Tomas. R. S. Williams 1434 1904-10-12

GH: 02250246 Carpesium cernuum Linnaeus Philippines: Benguet Mount Santo Tomas. R. S. Williams 1974 1904-11-30

GH: 02247724 Centratherum fruticosum S. Vidal Philippines: Benguet Mount Santo Tomas. R. S. Williams 1439 1904-10-29

GH: 02251627 Cirsium wallichii de Candolle Philippines: Benguet Mount Santo Tomas. R. S. Williams 1981 1904-11-30

GH: 02247848 Cyanthillium patulum (Dryand. ex Aiton) H.Rob. Philippines: Benguet Below Twin Peaks, Benguet Road. R. S. Williams 2011 1904-12-29

GH: 02247889 Elephantopus mollis Humboldt, Bonpland & Kunth Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 288 1903-12-1

GH: 02251241 Emilia fosbergii Nicolson Philippines: Baguio: [no additional data] R. S. Williams 1430 1904-11-5

GH: 02251240 Emilia fosbergii Nicolson Philippines: Baguio: [no additional data] R. S. Williams 1438 1904-10-24

GH: 00006572 Encelia canescens parvifolia (Humboldt, Bonpland & Kunth) Ball Peru: Arequipa R. S. Williams 2526 1901-8-8

GH: 00006572 Encelia pilocarpa Rusby Peru: Arequipa R. S. Williams 2526 1901-8-8

GH: 02205326 Ericameria discoidea (Nuttall) G. L. Nesom USA: Wyoming Yellowstone Falls R. S. Williams 1888

GH: 02206007 Erigeron caespitosus Nuttall USA: Montana [data not captured] R. S. Williams 85 1881

GH: 02348251 Erigeron filifolius Nuttall USA: Montana [data not captured] R. S. Williams 1895-8-22

GH: 02352181 Erigeron ochroleucus Nuttall USA: Montana [data not captured] R. S. Williams 345 1886-6-2

GH: 02351141 Erigeron pumilis Nuttall USA: Montana [data not captured] R. S. Williams 344 1886-6-12

GH: 02351099 Erigeron pumilis Nuttall USA: Montana Great Falls: [data not captured] R. S. Williams 344 1891-7-6

GH: 00257080 Eupatorium longipetiolatum Schultz Bipontinus ex Rusby Bolivia: La Paz Sorata: R. S. Williams 2408 1901-8-30
GH: 02248736 Eupatorium sambucifolium Elmer Philippines: Benguet Mount Santo Tomas. R. S. Williams 1081 1904-7-1

GH: 02248737 Eupatorium toppingianum Elmer Philippines: Benguet Mount Santo Tomas. R. S. Williams 1435 1904-10-12

GH: 02251425 Gynura procumbens (Loureiro) Merrill Philippines: Baguio: [no additional data] R. S. Williams 1429 1904-9-15

GH: 02251444 Gynura vidaliana Elmer Philippines: Benguet Mount Santo Tomas. R. S. Williams 1432 1904-10-12

GH: 02250347 Laggera alata Schultz Bipontinus ex Oliver Philippines: Baguio: Kias Hill. R. S. Williams 2017 1904-12-28

GH: 00010248 Mikania baccharoidea Rusby Bolivia: Cargadira, 8000 ft. R. S. Williams 1604 1902-7-20

GH: 02248839 Mikania cordata B. L. Robinson Philippines: Baguio: [no additional data] R. S. Williams 1428 1904-11-5

GH: 02248831 Mikania cordata B. L. Robinson Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 584 1904-2-16

GH: 00010510 Mikania williamsii B. L. Robinson Bolivia: Charopampa R. S. Williams 696 1901-9-23

GH: 02247919 Pseudelephantopus spicatus (Jussieu ex Aublet) C. F. Baker Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 132 1903-11-8

GH: 02251605 Senecio luzoniensis Merr. Philippines: Benguet Mount Santo Tomas. R. S. Williams 1977 1904-11-29

GH: 00012834 Stevia filipes Rusby Bolivia: La Paz Hills near Apolo; 6000 ft. R. S. Williams 124 1902-2-20

GH: 00012883 Stevia reclinata Rusby Bolivia: La Paz Near Apolo, alt. 5800 ft. R. S. Williams 1468 1902-7-25

GH: 00012884 Stevia reclinata Rusby Bolivia: Near Apolo, 5800 ft. R. S. Williams 1468 1902-7-25

Athyriaceae
GH: 02569137 Diplazium bulbiferum P. Brack Philippines: Mindanao: Sax River, Prov. Zamboanga R. S. Williams 2226 1906-2-18

GH: 02569272 Diplazium tenuifolium (Copeland) Lellinger Philippines: Zamboanga Sibugay Sax River, Prov. Zamboanga R. S. Williams 2298 1905-3-7

Begoniaceae
GH: 02228879 Begonia pseudolateralis Warburg Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 523 1904-1-13

GH: 02228927 Begonia sp. Philippines: Baguio: [no additional data] R. S. Williams 1532 1904-11-29

Berberidaceae
GH: 00038874 Mahonia philippinensis C. K. Schneider Philippines: Benguet Baguio, Luzon Island R. S. Williams 1460 1904-11-13

Betulaceae
A: 02195343 Betula glandulosa Michaux USA: Montana Columbia Falls R. S. Williams 1893-6-3

Bixaceae
GH: 02258748 Bixa orellana Linnaeus Philippines: Benguet Sablan R. S. Williams 1377 1904-11-17

Blasteniaceae
FH: 00913913 Blastenia ferruginea (Hudson) A. Massalongo Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 96 1898-9
FH: 00913914 Blastenia ferruginea (Hudson) A. Massalongo Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 27 1898-9
Blechnaceae
GH: 02569799 Stenochlaena palustris (N. L. Burman) Beddome Philippines: Davao Santa Cruz R. S. Williams 2825 1905-5

Bombacaceae
GH: 02258828 Ceiba pentandra (Linnaeus) Gaertner Philippines: Davao Davao R. S. Williams 3065 1905-7-20

Boraginaceae
GH: 00094690 Coldenia aggregata Rusby Peru: Payta R. S. Williams 2913 1901-7-25

GH: 00094693 Coldenia elongata Rusby Peru: Yura, 8400 feet R. S. Williams 2562 1901-8-10

A: 02476343 Cordia subcordata Lam. Philippines: Davao Santa Cruz R. S. Williams 2734 1905

A: 02476418 Cynoglossum zeylanicum (Vahl) Thunberg ex Lehmann Philippines: Benguet Baguio R. S. Williams 1129 1904-6-15

GH: 02476549 Ehretia philippinensis A. de Candolle Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 368 1903-12-26

GH: 02476553 Ehretia philippinensis A. de Candolle Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 513 1904-1-25

GH: 00096932 Tournefortia mapirensis Lingelsheim Bolivia: La Paz Charopampa, 1600 feet R. S. Williams 761 1907-9-19

GH: 02476822 Tournefortia sarmentosa Lamarck Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 525 1904-1-20

A: 02478091 Varronia dichotoma Ruiz & Pavon Philippines: Mindanao Island: Todaya, Mt. Apo, S. E. Mind... R. S. Williams 2552 1905

Brachytheciaceae
FH: 00790509 Brachythecium rutabulum (Hedwig) Schimper USA: Montana [data not captured] R. S. Williams 1897-5-4

FH: 00790510 Brachythecium rutabulum (Hedwig) Schimper USA: Montana [data not captured] R. S. Williams 1897-5

FH: 00220179 Homalothecium celebesiae (Müller Halle) Brotherus Philippines: Benguet Northern Luzon, Baguio R. S. Williams 1881 1904-9
FH: 00220178 Homalothecium laevisetum Sande Lacoste Philippines: Benguet Northern Luzon, Baguio R. S. Williams 1881 1904-9
FH: 00213965 Oxyrrhynchium distantifolium R. S. Williams Philippines: Benguet Northern Luzon, Baguio, 1570 m. R. S. Williams 1718 1904-10
FH: 00220178 Pleuropus appressifolium R. S. Williams Philippines: Benguet Northern Luzon, Baguio R. S. Williams 1881 1904-9
FH: 00220179 Pleuropus appressifolium R. S. Williams Philippines: Benguet Northern Luzon, Baguio R. S. Williams 1881 1904-9
Brassicaceae
GH: 01098775 Cardamine breweri S. Watson USA: Montana Columbia Falls R. S. Williams 1894-6-14

Bromeliaceae
GH: 02016072 Aechmea germinyana Baker Panama: Panama Panama canal and vicinity 2000-65000 ft. R. S. Williams 960 1908-4-17

GH: 00029049 Catopsis gracilis Rusby Bolivia: La Paz Guanai, 1500 feet R. S. Williams 738 1901-9-27

GH: 02015687 Puya sanctaecrucis (Baker) L. B. Smith Bolivia: La Paz Apolo R. S. Williams 2655 1902-3

Bryaceae
FH: 00059151 Bryum abditum R. S. Williams Philippines: Benguet Baguio, on rock walls R. S. Williams 3170 1904-9
FH: 00797680 Bryum alpinum gemmiparum (De Notaris) Kindberg USA: Montana [data not captured] R. S. Williams 1896-5

FH: 00797681 Bryum alpinum gemmiparum (De Notaris) Kindberg USA: Montana [data not captured] R. S. Williams 1896-5

FH: 00059152 Bryum atenense R. S. Williams Bolivia: Near Aten, 1400 m. R. S. Williams 1897 1902-6-18
FH: 00798369 Bryum caespiticium Hedwig USA: Montana [data not captured] R. S. Williams 1896-5

FH: 00798591 Bryum capillare Hedwig USA: Montana [data not captured] R. S. Williams 1899-9-20

FH: 00798592 Bryum capillare Hedwig USA: Montana [data not captured] R. S. Williams 1896-10-17

FH: 00798803 Bryum creberrimum Taylor USA: Montana [data not captured] R. S. Williams 1896-6-22

FH: 00995243 Bryum sandbergii Holzinger USA: Montana Along the Great Northern Railway, near Essex R. S. Williams 1896-8-17
FH: 00995244 Bryum sandbergii Holzinger USA: Montana Along the Great Northern Railway, near Essex R. S. Williams 1896-8-17
FH: 00995253 Bryum sandbergii Holzinger USA: Montana Along the Great Northern Railway, near Essex R. S. Williams 1896-8-17
FH: 00799623 Bryum turbinatum (Hedwig) Turner USA: Montana [data not captured] R. S. Williams 1896-8-17

FH: 00799715 Bryum weigelii Sprengel USA: Montana [data not captured] R. S. Williams 1894-8-1

FH: 00845599 Mniobryum atropurpureum (Wahlenberg) I. Hagen USA: Montana [data not captured] R. S. Williams 1897-5-6

FH: 00845600 Mniobryum atropurpureum (Wahlenberg) I. Hagen USA: Montana [data not captured] R. S. Williams 1897-5-6

FH: 00845602 Mniobryum atropurpureum (Wahlenberg) I. Hagen USA: Montana [data not captured] R. S. Williams 1897-5-6

FH: 00845672 Mniobryum pulchellum (Hedwig) Loeske USA: Montana [data not captured] R. S. Williams 1896-9-4

FH: 00916263 Pohlia drummondii (Müller Halle) A. L. Andrews USA: Montana [data not captured] R. S. Williams 1896-9-4
FH: 00220199 Pohlia saxensis R. S. Williams Philippines: South west Mindanao, Lax River R. S. Williams 2393 1905-2
FH: 00220248 Pseudopohlia bulbifera R. S. Williams Philippines: Benguet Northern Luzon, between Baguio and Sablan. R. S. Williams 1770 1904-11
Burseraceae
GH: 02276770 Canarium asperum Bentham Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 641 1904-2-19

GH: 02276759 Canarium asperum Bentham Philippines: Benguet Sablan R. S. Williams 1373 1904-11-18

GH: 02276912 Canarium denticulatum Blume Philippines: Davao del Sur Santa Cruz: [no additional data] R. S. Williams 2870 1905-6-1

GH: 02276911 Canarium denticulatum Blume Philippines: Mindanao Island: Sax River, Prov. Zamboanga R. S. Williams 2181 1905-2-28

A: 02276982 Canarium gracile Engler Philippines: [no additional data] R. S. Williams 3040

GH: 02277072 Canarium vrieseanum Engler Philippines: Zamboanga del Sur Sax River R. S. Williams 2111 1905-2-7

Caesalpiniaceae
A: 02229489 Caesalpinia bonduc (Linnaeus) Roxburgh Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 332 1903-12-3

GH: 02229527 Caesalpinia latisiliqua (Cavanilles) Hattink Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 701 1904-3-9

GH: 02229528 Caesalpinia latisiliqua (Cavanilles) Hattink Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 701 1904-3-9

GH: 02229548 Caesalpinia pulcherrima (Linnaeus) Swartz Philippines: Davao Santa Cruz R. S. Williams 2728 1905-4-23

GH: 02229743 Chamaecrista mimosoides (Linnaeus) Green Philippines: Baguio: [no additional data] R. S. Williams 994 1904-7-28

A: 00871808 Cynometra ramiflora Linnaeus Philippines: Davao Santa Cruz R. S. Williams 3051 1905

GH: 02231234 Gleditsia rolfei S. Vidal Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 564 1904-2-5

A: 02232399 Phanera finlaysoniana Bentham Philippines: Mindanao: Todaya, Mt. Apo, SE Mindanao R. S. Williams 2594 1905

GH: 02232420 Phanera integrifolia cumingiana (Bentham) de Wit Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 563 1904-2-3

Caloplacaceae
FH: 00888037 Caloplaca elegans (Link) Th. Fries Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 25 1898-10
FH: 00409285 Caloplaca jungermanniae (Vahl) Th. Fries Canada: Yukon Territory Dawson (Yukon Territory): [data not captured... R. S. Williams 1898

FH: 00913981 Caloplaca jungermanniae (Vahl) Th. Fries Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 26 1898-9
Calymperaceae
FH: 00220565 Mitthyridium flavum (Müller Halle) H. Robinson Philippines: Bataan Central Luzon, Lamas River R. S. Williams 824 1904-3

FH: 00220566 Mitthyridium flavum (Müller Halle) H. Robinson Philippines: Bataan Central Luzon, Lamao river R. S. Williams 824 1904-3
FH: 00220565 Syrrhopodon luzonensis R. S. Williams Philippines: Bataan Central Luzon, Lamas River R. S. Williams 824 1904-3

FH: 00220566 Syrrhopodon luzonensis R. S. Williams Philippines: Bataan Central Luzon, Lamao river R. S. Williams 824 1904-3
Caryophyllaceae
GH: 01741098 Arenaria capillaris americana Maguire USA: Montana Columbia Falls R. S. Williams 1899-7-12

GH: 01743350 Cerastium beeringianum Chamisso & Schlechtendal USA: Montana Mt Stanton R. S. Williams 1894-8-1

Casuarinaceae
GH: 02246046 Casuarina equisetifolia Linnaeus Philippines: Benguet Benguet Road. R. S. Williams 1312 1904-9-7

A: 02246087 Casuarina rumphiana Miquel Philippines: Davao del Sur Todaya, Mt. Apo. R. S. Williams 2551 1905

Catoscopiaceae
FH: 00514748 Catoscopium nigritum (Hedwig) Bridel Canada: Yukon Territory [no additional data] R. S. Williams

Celastraceae
A: 00348354 Microtropis curranii Merrill Philippines: Benguet Mount Santo Tomas, Prov. Benguet, Northern L... R. S. Williams 1300 1904-10-12

Chrysobalanaceae
GH: 02260366 Maranthes corymbosa Blume Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 565 1904-2-4

A: 02260373 Maranthes corymbosa Blume Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 645 1904-3-8

Cladoniaceae
FH: 01139854 Cladonia bellidiflora (Acharius) Schaerer Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 00412193 Cladonia cariosa (Acharius) Sprengel Canada: Yukon Territory [data not captured] R. S. Williams 1898-5

FH: 01139865 Cladonia cariosa (Acharius) Sprengel Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01139866 Cladonia cariosa (Acharius) Sprengel Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01139890 Cladonia coccifera (Linnaeus) Willdenow Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01139891 Cladonia coccifera (Linnaeus) Willdenow Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01139938 Cladonia crispata (Acharius) Flotow Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01139939 Cladonia crispata (Acharius) Flotow Canada: Yukon Territory [data not captured] R. S. Williams 1899-5
FH: 01139959 Cladonia digitata (Linnaeus) Hoffmann Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01140028 Cladonia furcata (Hudson) Schrader Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01140029 Cladonia furcata (Hudson) Schrader Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01140137 Cladonia pyxidata (Linnaeus) Hoffmann Canada: Yukon Territory [data not captured] R. S. Williams 1899-4
FH: 01140159 Cladonia rangiferina (Linnaeus) Weber ex F. H. Wiggers Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01140286 Cladonia uncialis (Linnaeus) Weber ex F. H. Wiggers Canada: Yukon Territory [data not captured] R. S. Williams 1898-5-12
Clusiaceae
GH: 00067330 Calophyllum auriculatum Merrill Philippines: Sax River, Province Zamboanga, Mindanao Isla... R. S. Williams 2339 1905-2-20

GH: 00067330 Calophyllum venulosum venulosum Philippines: Sax River, Province Zamboanga, Mindanao Isla... R. S. Williams 2339 1905-2-20

Collemataceae
FH: 01139680 Collema glaucescens Hoffmann Canada: Yukon Territory [data not captured] R. S. Williams 1898-9-18
FH: 01139681 Collema glaucescens Hoffmann Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-3
FH: 01139683 Collema melaenum (Acharius) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1899-3-18
FH: 01139695 Collema nigrescens (Hudson) de Candolle Canada: Yukon Territory [no additional data] R. S. Williams 1899-4-3
Convolvulaceae
A: 02421241 Decalobanthus peltatus (Linnaeus) A. R. Simões & Staples Philippines: Sax River, Near San Ramon R. S. Williams 2424 1905-3-7

GH: 02422927 Evolvulus alsinoides Linnaeus Philippines: Davao Santa Cruz, S. E. Mindanao R. S. Williams 2932 1905-6-13

GH: 00249777 Lepistemon binectariferum trichocarpum (Gagnepain) Ooststroom Philippines: Bataan Lamao river, Mt. Mariveles, Prov. Bataan, Ce... R. S. Williams 520 1904-1-20

GH: 00249777 Lepistemon flavescens Blume Philippines: Bataan Lamao river, Mt. Mariveles, Prov. Bataan, Ce... R. S. Williams 520 1904-1-20

Cucurbitaceae
GH: 00261765 Zehneria mucronata (Blume) Miquel Philippines: Baguio: Prov. Benguet, Northern Luzon R. S. Williams 1446 1904-11

Cunoniaceae
A: 02460328 Caldcluvia celebica (Blume) Hoogland Philippines: Mindanao: Mt. Apo, S.E. Mindanao R. S. Williams 2532 1905

Cyatheaceae
GH: 02530198 Alsophila caudata J. Smith Philippines: Bataan Mt. Mariveles R. S. Williams 779 1904-3-24

GH: 02530204 Alsophila caudata J. Smith Philippines: Bataan Upper Lamao River, Mt. Mariveles R. S. Williams 677 1904-2-24

GH: 02530212 Alsophila fuliginosa Christ Philippines: Mindanao: Mt. Apo, SE Mindanao R. S. Williams 2513 1905-3-30

GH: 02530240 Alsophila heterochlamydea (Copeland) R. M. Tryon Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 677 1904-3-24

GH: 02530986 Sphaeropteris suluensis (Baker) R. M. Tryon Philippines: Zamboanga Sibugay Sax River R. S. Williams 2248 1905-2-19

Cycadaceae
GH: 02247682 Cycas circinalis Linnaeus Philippines: Davao del Sur Santa Cruz. R. S. Williams 3058 1905-6-29

GH: 02247682 Cycas edentata de Laubenfels Philippines: Davao del Sur Santa Cruz. R. S. Williams 3058 1905-6-29

Cyperaceae
GH: 02392595 Carex arcta Boott USA: Montana [data not captured] R. S. Williams 947 1892-7-17

GH: 02315010 Carex brevipes W. Boott ex B. D. Jackson USA: Montana [data not captured] R. S. Williams 468 1888-7-24

GH: 02393662 Carex canescens Linnaeus USA: Montana [data not captured] R. S. Williams 792 1888-8-5

GH: 02429300 Carex cruciata rafflesiana (Boott) Nooteboom Philippines: Baguio: [no additional data] R. S. Williams 1241 1904-5-14

GH: 02395570 Carex cusickii Mackenzie ex Piper & Beattie USA: Montana [data not captured] R. S. Williams 1892-7-20

GH: 02395568 Carex cusickii Mackenzie ex Piper & Beattie USA: Montana [data not captured] R. S. Williams 942 1892-9-12

GH: 02395567 Carex cusickii Mackenzie ex Piper & Beattie USA: Montana [data not captured] R. S. Williams 942 1892-9-12

GH: 02315010 Carex deflexa boottii L. H. Bailey USA: Montana [data not captured] R. S. Williams 468 1888-7-24

GH: 02394581 Carex disperma Dewey USA: Montana [data not captured] R. S. Williams 467 1886-8-14

GH: 02368891 Carex duriuscula C. A. Meyer USA: Montana [data not captured] R. S. Williams 463 1886-6-9

GH: 02368110 Carex gynocrates Wormskjold ex Drejer USA: Montana [data not captured] R. S. Williams 646 1887-8-6

GH: 02370378 Carex hoodii Boott USA: Montana [data not captured] R. S. Williams 833 1889-7-24

GH: 02370377 Carex hoodii Boott USA: Montana [data not captured] R. S. Williams 1894-6-12

GH: 02392994 Carex interior L. H. Bailey USA: Montana [data not captured] R. S. Williams 471 1886-7-14

GH: 02578505 Carex laeviconica Dewey USA: Montana [data not captured] R. S. Williams 459 1888-7-4

GH: 02368367 Carex micropoda C. A. Meyer USA: Montana [data not captured] R. S. Williams 1892-9-8

GH: 02367751 Carex nardina Fries USA: Montana [data not captured] R. S. Williams 1894-8-1

GH: 02368682 Carex nuttallii Dewey USA: Montana [data not captured] R. S. Williams 1888-7-20

GH: 02368681 Carex nuttallii Dewey USA: Montana [data not captured] R. S. Williams 465 1887-7-3

GH: 00249658 Carex pediformis C. A. Meyer China: Beijing Municipality In montosis juxta Peking R. S. Williams 15065 1869
GH: 02429354 Carex phacota Sprengel Philippines: Baguio: [no additional data] R. S. Williams 1246 1904-5-14

GH: 02369211 Carex praegracilis W. Boott USA: Montana [data not captured] R. S. Williams 457 1887-8-12

GH: 01773405 Carex retrorsa Schweinitz USA: Montana [data not captured] R. S. Williams 1892-7-30

GH: 02467225 Carex rossii Boott USA: Montana Highwood Cañon. R. S. Williams 793 1888-6-21

GH: 01775091 Carex saxatilis Linnaeus USA: Montana [data not captured] R. S. Williams 949 1892-8-31

GH: 02395962 Carex stipata Muhlenberg ex Willdenow USA: Montana [data not captured] R. S. Williams 640 1887-6-25

GH: 01773716 Carex utriculata Boott USA: Montana [data not captured] R. S. Williams 460 1886-7-20

GH: 02263069 Cyperus stenophyllus Valck. Suringar Philippines: Davao Padada R. S. Williams 2969 1905-6-28

GH: 02430137 Fimbristylis aestivalis Vahl Philippines: Baguio: [no additional data] R. S. Williams 1229 1904-5-13

GH: 02430154 Fimbristylis complanata (Retzius) Link Philippines: Davao del Sur Santa Cruz: [no additional data] R. S. Williams 2838 1905-4-21

GH: 02430216 Fimbristylis dichotoma (Linnaeus) Vahl Philippines: Baguio: [no additional data] R. S. Williams 1248 1904-6-4

GH: 02430198 Fimbristylis dichotoma (Linnaeus) Vahl Philippines: Baguio: [no additional data] R. S. Williams 1236 1904-5-16

GH: 02430277 Fimbristylis ovata (N. L. Burman) J. Kern Philippines: Zamboanga del Sur San Ramon. R. S. Williams 2440 1905-3-13

GH: 00027859 Fimbristylis paludosa Merrill Philippines: Benguet Baguio, Luzon Island R. S. Williams 1239 1904-5-23

GH: 00027859 Fimbristylis salbundia (Nees) Kunth Philippines: Benguet Baguio, Luzon Island R. S. Williams 1239 1904-5-23

GH: 02430489 Gahnia javanica H. Zollinger & A. Moritzi Philippines: Mindanao Island: Mt. Apo. R. S. Williams 2621 1905-3-31

GH: 02430756 Kyllinga brevifolia Rottbøll Philippines: Baguio: [no additional data] R. S. Williams 1228 1904-5-17

GH: 02431494 Rhynchospora rubra (Loureiro) Makino Philippines: Baguio: [no additional data] R. S. Williams 1552 1904-11-7

GH: 02431973 Scirpus ternatanus Reinwardt ex Miquel Philippines: Baguio: [no additional data] R. S. Williams 1249 1904-5-26

GH: 02468389 Scleria parvula Steudel Philippines: Baguio: [no additional data] R. S. Williams 1970 1904-9-14

Daphniphyllaceae
GH: 02294724 Daphniphyllum glaucescens luzonense (Elmer) T. C. Huang Philippines: Benguet Mount Santo Tomas, Prov. Benguet, Northern L... R. S. Williams 1337 1904-10-29

Davalliaceae
GH: 02508689 Davallia brevipes Copeland Philippines: Mindanao Island: Sax River, Prov. Zamboanga R. S. Williams 2264 1905-2-24

GH: 02508723 Davallia divaricata Blume Philippines: Mindanao Island: Todaya, Mt. Apo, SE Mindana... R. S. Williams 2447 1905-4

Dennstaedtiaceae
GH: 02287773 Microlepia sp. Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 140 1903-11-8

GH: 02287765 Microlepia todayensis Christ Philippines: Mindanao: Todaya, Mt. Apo, S. E. Mindanao R. S. Williams 2451 1905-4-8

Dicksoniaceae
GH: 02282316 Cibotium barometz (Linnaeus) J. Smith Philippines: Zamboanga: Sax River R. S. Williams 2296 1905-3-8

Dicranaceae
FH: 00059300 Campylopus ingeniensis R. S. Williams Bolivia: Ingenio, on rock R. S. Williams 1772 1902-9-26
FH: 00059310 Campylopus subcubitus R. S. Williams Bolivia: La Paz Lower Sorata River, 1200 m. R. S. Williams 1749 1902-6-13
FH: 00059311 Campylopus subericoides R. S. Williams Philippines: Benguet Mt. Santo Tomas, on earth R. S. Williams 1857 1904-11
FH: 00540147 Cynodontium strumiferum (Hedwig) Lindberg Canada: Yukon Territory [data not captured] R. S. Williams 1898-5-20

FH: 00060397 Dicranella insularis R. S. Williams Philippines: Bataan Central Luzon, Lamas, on earth and rock, 60 ... R. S. Williams 832 1903-12
FH: 00060448 Dicranodontium subaspermum R. S. Williams Philippines: Benguet Luzon Island, Mount Santo Tomas R. S. Williams 1846 1904-10
FH: 00060450 Dicranodontium subaspermum R. S. Williams Philippines: Benguet Northern Luzon Island, Mount Santo Tomas,on ... R. S. Williams 1846 1904-10
FH: 00541964 Dicranum bonjeanii angustum (Lindberg) Podpera Canada: Yukon Territory [data not captured] R. S. Williams 1899-7-23

FH: 00780669 Dicranum fragilifolium Lindberg Canada: Yukon Territory [data not captured] R. S. Williams

FH: 00780673 Dicranum fragilifolium Lindberg Canada: Yukon Territory [data not captured] R. S. Williams 1898-6-18

FH: 00791008 Dicranum majus orthophyllum A. Braun ex Milde Canada: Northwest Territories [data not captured] R. S. Williams 1898-5-15

FH: 00842821 Kiaeria falcata I. Hagen Canada: Yukon Territory [no additional data] R. S. Williams

FH: 00842831 Kiaeria glacialis (Berggren) I. Hagen Canada: Northwest Territories [data not captured] R. S. Williams 1898

FH: 00780669 Orthodicranum fragilifolium (Lindberg) Podpera Canada: Yukon Territory [data not captured] R. S. Williams

FH: 00780673 Orthodicranum fragilifolium (Lindberg) Podpera Canada: Yukon Territory [data not captured] R. S. Williams 1898-6-18

Dipterocarpaceae
GH: 02566571 Dipterocarpus gracilis Blume Philippines: Bataan Lamao River, Mt. Mariveles, Prov. Bataan, Ce... R. S. Williams 788 1903-3-31

Dryopteridaceae
GH: 02505237 Bolbitis rhizophylla (Kaulfuss) Hennipman Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 234 1903-11-24

Ebenaceae
A: 02477818 Diospyros digyna Jacquin Philippines: Zamboanga: Sax River R. S. Williams 2351 1905-2-27

A: 02477884 Diospyros foveoreticulata Merrill Philippines: Davao Santa Cruz R. S. Williams 3049 1905

GH: 02477900 Diospyros kurzii Hiern Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 517 1904-1-23

GH: 02477898 Diospyros kurzii Hiern Philippines: Mindanao Island: Todaya, Mt. Apo, S. E. Mind... R. S. Williams 2682 1905-4-4

GH: 02476080 Diospyros sp. Philippines: Mindanao Island: Sax River, Prov. Zamboanga R. S. Williams 2317 1905-2-28

GH: 02476076 Diospyros sp. Philippines: Davao Santa Cruz R. S. Williams 2861 1905-6-2

A: 02476128 Diospyros sp. Philippines: Davao Santa Cruz R. S. Williams 2779 1905

Elaeocarpaceae
A: 02464859 Elaeocarpus glaber Blume Philippines: Mindanao Island: Prov Zamboanga R. S. Williams 2134 1905-2-11

GH: 02464858 Elaeocarpus glaber Blume Philippines: Mindanao Island: Sax River, Prov. Zamobanga R. S. Williams 2134 1905-2-11

GH: 02464985 Elaeocarpus pendulus Merrill Philippines: Baguio: [no additional data] R. S. Williams 916 1904-9-19

GH: 00052116 Elaeocarpus subglobosus Merrill Philippines: Benguet Baguio, Northern Luzon R. S. Williams 1036 1904-10-15

GH: 00052120 Elaeocarpus venosus C. B. Robinson Philippines: Benguet Mount Santo Tomas, Northern Luzon R. S. Williams 2022 1904-11-29

Elatinaceae
GH: 00067223 Elatine williamsii Rydberg USA: Montana Lake in Lower Sand Coulee, Big Belt Mountain... R. S. Williams 855 1891-9-3

Ericaceae
GH: 02440858 Ardisia polysticta Miquel Philippines: Benguet Baguio R. S. Williams 979 1904-10-12

GH: 01820475 Gaultheria leucocarpa cumingiana (Vidal) T. Z. Hsu Philippines: Baguio: [no additional data] R. S. Williams 951 1904-9-21

GH: 01594193 Kalmia microphylla (Hooker) A. Heller USA: Montana McDonald Lake R. S. Williams 888 1895-8-6

GH: 01594195 Kalmia microphylla (Hooker) A. Heller USA: Montana Henry Mtn. R. S. Williams 1897-8-25

A: 01594197 Kalmia microphylla (Hooker) A. Heller USA: Montana Lake Ferry R. S. Williams 1895-8-6

A: 01718720 Menziesia glabella A. Gray USA: Montana Columbia Falls. R. S. Williams 1894-6-14

GH: 01718729 Menziesia glabella A. Gray USA: Montana Columbia Falls R. S. Williams 1894-6-14

GH: 01719270 Monotropa hypopitys Linnaeus USA: Montana 40 [Mile Creek] R. S. Williams 1897-8-15

GH: 01719506 Monotropa uniflora Linnaeus USA: Montana Columbia Falls R. S. Williams 1892-9-19

A: 01683178 Phyllodoce empetriformis (Smith) D. Don USA: Montana [data not captured] R. S. Williams 1894-8-18

GH: 01683193 Phyllodoce empetriformis (Smith) D. Don USA: Montana [data not captured] R. S. Williams 887 1894-8-18

GH: 02545408 Rhododendron jasminiflorum copelandii (Merrill) Sleumer Philippines: Mindanao: Mt. Apo, S. E. Mindanao. Bogolo: N... R. S. Williams 2681 1905-3-31

GH: 00015805 Rhododendron quadrasianum davaoense Copeland Philippines: Davao Mount Apo, Mindanao Island R. S. Williams 2543 1905-3-31

GH: 02545485 Rhododendron quadrasianum rosmarinifolium (Vidal) Copeland Philippines: Benguet Mount Santo Tomas R. S. Williams 1335 1904-10-29

GH: 02545533 Rhododendron williamsii Merrill ex H. F. Copeland Philippines: Benguet Mount Santo Tomas R. S. Williams 990 1904-7-20

A: 02545530 Rhododendron williamsii Merrill ex H. F. Copeland Philippines: La Union Mount Santo Tomas R. S. Williams 990 1904-7-20

A: 02545799 Styphelia suaveolens (Hooker f.) Warburg ex P. B. Sarasin & K. F. Sarasin Philippines: Mindanao: Mt. Apo, S. E. Mindanao R. S. Williams 2528 1905

Euphorbiaceae
GH: 00055171 Alcinaeanthus philippinensis Merrill Philippines: Davao Southeast Mindanao Island, Santa Cruz R. S. Williams 2884 1905-6-6

A: 02563950 Claoxylon brachyandrum Pax & K. Hoffmann Philippines: Mindanao Island: Mt. Apo, S.E. Mindanao R. S. Williams 2529 1905

GH: 02562022 Claoxylon purpureum Merrill Philippines: Baguio: [no additional data] R. S. Williams 1071 1904-6-4

GH: 02562031 Claoxylon rubescens Miquel Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 533 1904-1-28

GH: 02562171 Cleidion javanicum Blume Philippines: Davao Santa Cruz, S.E. Mindanao R. S. Williams 2716 1905-4-18

A: 00277241 Croton williamsii Rusby Bolivia: San Juan, 3200 ft. R. S. Williams 210 1902-3-22

GH: 01166334 Cyclostemon cumingii Baillon Philippines: Bataan Lamao River, Mt. Mariveles, Prov. Bataan, Ce... R. S. Williams 377 1903-12-30

GH: 01166334 Cyclostemon littoralis C. B. Robinson Philippines: Bataan Lamao River, Mt. Mariveles, Prov. Bataan, Ce... R. S. Williams 377 1903-12-30

GH: 01166334 Drypetes cumingii Pax & K. Hoffmann Philippines: Bataan Lamao River, Mt. Mariveles, Prov. Bataan, Ce... R. S. Williams 377 1903-12-30

GH: 02498651 Drypetes grandifolia Pax & K. Hoffmann Philippines: Mindanao Island: Sax River, Prov. Zamboanga R. S. Williams 2165 1905-2-14

GH: 01166334 Drypetes littoralis (C. B. Robinson) Merrill Philippines: Bataan Lamao River, Mt. Mariveles, Prov. Bataan, Ce... R. S. Williams 377 1903-12-30

GH: 02498651 Drypetes longifolia (Blume) Pax & K. Hoffmann Philippines: Mindanao Island: Sax River, Prov. Zamboanga R. S. Williams 2165 1905-2-14

GH: 02559223 Homalanthus macradenius Pax & K. Hoffmann Philippines: Mindanao: Todaya, Mt. Apo, S. E. Mindanao R. S. Williams 2570 1905-4-4

GH: 02559338 Homalanthus populneus (Geiseler) Pax Philippines: Zamboanga: Sax River R. S. Williams 2077 1905-2-1

A: 02559337 Homalanthus populneus (Geiseler) Pax Philippines: Mindanao: Santa Cruz, Prov. Davao R. S. Williams 2737 1905

GH: 02418330 Macaranga bicolor Müller Arg. Philippines: Davao del Sur Santa Cruz: [data not captured] R. S. Williams 2950 1905-6

GH: 02418417 Macaranga hispida (Blume) Müller Argoviensis Philippines: Zamboanga Sibugay Sax River R. S. Williams 2083 1905-2-1

GH: 02418572 Macaranga sp. Philippines: Mindanao Island: Sax River, Prov. Zamboanga R. S. Williams 2184

GH: 02418536 Macaranga tanarius (Linnaeus) Müller Argoviensis Philippines: Bataan Lamas Riv., Mt. Mariveles R. S. Williams 471 1904-1-9

GH: 02418535 Macaranga tanarius (Linnaeus) Müller Argoviensis Philippines: Bataan Lamas Riv., Mt. Mariveles R. S. Williams 470 1904-1-4

A: 02417849 Mallotus floribundus (Blume) Müller Arg. Philippines: Davao [data not captured] R. S. Williams 2783 1905-5-17

GH: 02425726 Mallotus floribundus (Blume) Müller Arg. Philippines: Zamboanga del Sur Sax River, Prov. Zamboanga R. S. Williams 2081 1905-1-21

GH: 02415159 Mallotus playfairii Hemsley Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 199 1903-11-11

A: 02415260 Mallotus resinosus (Blanco) Merrill Philippines: Davao Santa Cruz R. S. Williams 1905

GH: 00055171 Neoscortechinia forbesii (Hooker f.) S. Moore Philippines: Davao Southeast Mindanao Island, Santa Cruz R. S. Williams 2884 1905-6-6

GH: 00055171 Neoscortechinia philippinensis (Merrill) Welzen Philippines: Davao Southeast Mindanao Island, Santa Cruz R. S. Williams 2884 1905-6-6

GH: 00055171 Neoscortechinia sp. Philippines: Davao Southeast Mindanao Island, Santa Cruz R. S. Williams 2884 1905-6-6

GH: 02416398 Reutealis trisperma (Blanco) Airy Shaw Philippines: Davao Santa Cruz R. S. Williams 2852 1905-5-17

GH: 02416590 Spathiostemon javensis Blume Philippines: Davao Santa Cruz R. S. Williams 2808 1905-5-17

Fabaceae
A: 02234832 Abrus sp. Philippines: Benguet Antamok R. S. Williams 1415 1904-10-22

GH: 02233017 Alysicarpus vaginalis (Linnaeus) de Candolle Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 59 1903-10-31

GH: 02067404 Astragalus aboriginum Richardson USA: Montana Belt Creek R. S. Williams 93 1881

GH: 02064862 Astragalus bourgovii A. Gray USA: Montana Summit R. S. Williams 1894-7-24

GH: 02047363 Astragalus cibarius E. Sheldon USA: Montana Sand Conler R. S. Williams 745 1888-5-29

GH: 02044984 Astragalus inflexus Douglas USA: Montana Sand Coulee R. S. Williams 746 1888-5-31

GH: 01126112 Astragalus inflexus Douglas USA: Montana Near Belt River R. S. Williams 74b 1888-6-23

GH: 02052144 Astragalus kentrophyta implexus (Canby) Barneby USA: Wyoming Yellowstone Park R. S. Williams 5 1888

GH: 02049111 Astragalus miser serotinus (A. Gray ex J. G. Cooper) Barneby USA: Montana Columbia Falls R. S. Williams 1894-7-12

GH: 02048499 Astragalus robbinsii minor (Hooker) Barneby USA: Montana Columbia Falls R. S. Williams 1895-7-6

GH: 02048500 Astragalus robbinsii minor (Hooker) Barneby USA: Montana Summit G.N.Ry. R. S. Williams 1894-7-25

GH: 02233223 Cajanus scarabaeoides (Linnaeus) Thouars Philippines: Benguet Antamok R. S. Williams 1418 1904-10-22

GH: 02233477 Clitoria ternatea Linnaeus Philippines: Laguna Los Banos: [no additional data] R. S. Williams 2057 1905-1-15

GH: 02233790 Crotalaria acicularis Buchanan-Hamilton Philippines: Baguio: [no additional data] R. S. Williams 1411 1904-9-16

A: 02236149 Derris oblongifolia Merrill Philippines: Davao Santa Cruz R. S. Williams 2788 1905-4-24

GH: 02236238 Derris spanogheana Blume ex Miquel Philippines: Zamboanga: Sax River R. S. Williams 2398 1905-2

GH: 02237301 Desmodium gangeticum (Linnaeus) de Candolle Philippines: Benguet Itogon R. S. Williams 1406 1904-10-18

GH: 02237344 Desmodium laxiflorum de Candolle Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 269 1903-12-1

GH: 02237366 Desmodium microphyllum (Thunberg) de Candolle Philippines: Benguet Baguio R. S. Williams 1895 1904-11-2

GH: 02237369 Desmodium motorium (Houttuyn) Merrill Philippines: Benguet Antamok R. S. Williams 1407 1904-10-22

GH: 02237446 Desmodium sequax Wallich Philippines: Baguio: [no additional data] R. S. Williams 914 1904-9-20

GH: 02237468 Desmodium triquetrum (Linnaeus) de Candolle Philippines: Benguet Bet. Banguio & Antamok R. S. Williams 1414 1904-10-22

GH: 02237476 Desmodium triquetrum pseudotriquetrum (de Candolle) Prain Philippines: Benguet Between Baguio and Antamok R. S. Williams 1414 1904-10-22

GH: 02237522 Desmodium velutinum de Candolle Philippines: Benguet Itogon R. S. Williams 1405 1904-10-18

GH: 02237639 Dumasia sp. Philippines: Benguet Mount Santo Tomas R. S. Williams 1412 1904-10-12

GH: 02261430 Indigofera hirsuta Linnaeus Philippines: Benguet Antamok R. S. Williams 1417 1904-10-22

GH: 02177296 Lupinus minimus Douglas USA: Montana [data not captured] R. S. Williams 1897-5-22

GH: 02132805 Oxytropis lagopus atropurpurea (Rydberg) Barneby USA: Montana [data not captured] R. S. Williams 353 1886-5-26

GH: 02262271 Pongamia pinnata (Linnaeus) Pierre Philippines: Davao Santa Cruz R. S. Williams 2187 1905-4-30

GH: 02262415 Pueraria pulcherrima Merrill ex Koorders-Schumacher Philippines: Davao Santa Cruz R. S. Williams 2953 1905-6-2

GH: 02262596 Smithia ciliata Royle Philippines: Baguio: [no additional data] R. S. Williams 970 1904-9-28

GH: 02262600 Smithia sensitiva Aiton Philippines: Benguet Trinidad R. S. Williams 969 1904-9-28

GH: 02262601 Smithia sensitiva Aiton Philippines: Benguet near Trinidad R. S. Williams 1277 1904-7-5

GH: 02262653 Solori philippinensis (Merrill) Sirichamorn & Adema Philippines: Bataan Mt. Mariveles R. S. Williams 714 1903-3-15

GH: 02262665 Solori scandens (Roxburgh) Sirichamorn & Adema Philippines: Davao Santa Cruz R. S. Williams 2857 1905-5-31

GH: 02262670 Solori scandens (Roxburgh) Sirichamorn & Adema Philippines: Baguio: [no additional data] R. S. Williams 1053 1904-6-10

GH: 00057469 Strongylodon pulcher C. B. Robinson Philippines: Mindanao Island, Zamboanga Province, Sax Riv... R. S. Williams 2362 1905-2-22

GH: 02259058 Teramnus labialis (Linnaeus f.) Sprengel Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 268 1903-12-1

GH: 02259160 Uraria lagopodioides (Linnaeus) Desvaux Philippines: Davao Santa Cruz R. S. Williams 2712 1905-4-19

GH: 02259164 Uraria picta (Jacquin) Desvaux Philippines: Davao Santa Cruz R. S. Williams 2929 1905-6-13

GH: 02259165 Uraria picta (Jacquin) Desvaux Philippines: Benguet Antamok R. S. Williams 1416 1904-10-22

Fabroniaceae
FH: 00213097 Helicodontium spicatinervium R. S. Williams Bolivia: Pelichuco, on tree, 3350 m. R. S. Williams 2773 1902-5-5
Fagaceae
GH: 02556905 Lithocarpus jordanae (Laguna y Villanueva) Rehder Philippines: Benguet Mount Santo Tomas, Prov. Benguet, Northern L... R. S. Williams 1365 1904-10-30

GH: 02556904 Lithocarpus jordanae (Laguna y Villanueva) Rehder Philippines: Benguet Mount Santo Tomas, Prov. Benguet, Northern L... R. S. Williams 1321 1904-10-12

A: 02557002 Lithocarpus solerianus (Vidal) Rehder Philippines: Davao del Sur Mtn. near Santa Cruz, Prov. Davao, S. E. Min... R. S. Williams 3035 1905-7-5

GH: 02557019 Lithocarpus submonticola (Elmer) Rehder Philippines: Benguet Baguio, Prov. Benguet, Northern Luzon R. S. Williams 1363 1904-6-13

GH: 02557018 Lithocarpus submonticola (Elmer) Rehder Philippines: Benguet Baguio, Prov. Benguet, Northern Luzon R. S. Williams 1364 1904-11-5

A: 02568424 Lithocarpus sulitii Soepadmo Philippines: Bataan Lamao River, Mt. Mariveles, Prov. Bataan, Ce... R. S. Williams 705 1904-3-12

GH: 02557038 Lithocarpus woodii (Hance) A.Camus Philippines: Benguet Baguio, Prov. Benguet, Northern Luzon R. S. Williams 949 1904-9-16

Fissidentaceae
FH: 00213864 Moenkemeyera obtusifolia R. S. Williams Bolivia: Apolo R. S. Williams 1698 1902-7-7
FH: 00213865 Moenkemeyera obtusifolia R. S. Williams Bolivia: Tumupasa R. S. Williams 1703 1902-1-15
FH: 00213866 Moenkemeyera obtusifolia R. S. Williams Bolivia: Tumupasa R. S. Williams 1700 1902-1-3
Fontinalaceae
FH: 00540579 Dichelyma uncinatum Mitten USA: Montana [data not captured] R. S. Williams 1895-8-9

Georgiaceae
FH: 01132700 Tetraphis geniculata Girgensohn ex Milde USA: Alaska [data not captured] R. S. Williams 1898-3-27

Gesneriaceae
GH: 02313908 Cyrtandra sp. Philippines: Mindanao Island: Sax River, Prov. Zamboanga R. S. Williams 2087 1905-2-1

GH: 02314447 Rhynchoglossum obliquum Blume Philippines: Benguet Baguio R. S. Williams 1039 1904-10-8

GH: 02314446 Rhynchoglossum obliquum Blume Philippines: Mindanao: Sax River, Prov. Zamboanga R. S. Williams 2082 1905-2-1

GH: 02314490 Rhynchotechum discolor (Maximowicz) B. L. Burtt Philippines: Benguet Baguio R. S. Williams 1366 1904-8-7

Gleicheniaceae
GH: 02552705 Dicranopteris sp. Philippines: Mindanao: Todaya, Mt. Apo, SE Mindanao R. S. Williams 2459 1905-4

Gnetaceae
GH: 02461713 Gnetum gnemon Linnaeus Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 505 1904-1-20

GH: 02461711 Gnetum gnemon Linnaeus Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 713 1904-3-12

Grammitaceae
GH: 02221298 Prosaptia multicaudata (Copeland) Parris Philippines: Mindanao Island: Mt Apo R. S. Williams 2477 1905-3-31

Grimmiaceae
FH: 00557677 Grimmia funalis (Schwägrichen) Bruch & Schimper USA: Montana [data not captured] R. S. Williams 1897-5-22

FH: 00557678 Grimmia funalis (Schwägrichen) Bruch & Schimper USA: Montana [data not captured] R. S. Williams 1897-5-22

FH: 00557679 Grimmia funalis (Schwägrichen) Bruch & Schimper USA: Montana [data not captured] R. S. Williams 1897-5-22

FH: 00825006 Grimmia torquata Drummond Canada: Yukon Territory [data not captured] R. S. Williams 1898-5-28

FH: 00781449 Racomitrium crispipilum (Taylor) Spruce Bolivia: Near Ingenio R. S. Williams 1776 1901-9-10
FH: 00781449 Racomitrium sublanuginosum Schimper ex R. S. Williams Bolivia: Near Ingenio R. S. Williams 1776 1901-9-10
FH: 00921019 Scouleria aquatica Hooker USA: Montana [data not captured] R. S. Williams 1895-8-6

FH: 00921020 Scouleria aquatica Hooker USA: Montana [data not captured] R. S. Williams 1893-10

FH: 00921021 Scouleria aquatica Hooker USA: Montana [data not captured] R. S. Williams 1893-10

FH: 00921024 Scouleria aquatica Hooker USA: Montana [data not captured] R. S. Williams 1893-10

Gymnomitriaceae
FH: 00494651 Acolea concinnata (Lightfoot) Dumortier USA: Montana [data not captured] R. S. Williams 1895-8-2

Hernandiaceae
GH: 02222570 Illigera luzonensis Merrill Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 310 1903-12-3

Hookeriaceae
FH: 00545014 Lepidopilidium divaricatum (Dozy & Molkenboer) Brotherus Bolivia: Santa Barbara R. S. Williams 2879 1902-8-30
FH: 00545014 Lepidopilum fruticola Müller Halle Bolivia: Santa Barbara R. S. Williams 2879 1902-8-30
Hydrocharitaceae
GH: 00022850 Elodea peruviensis H. St. John Peru: Puno Juliaca R. S. Williams 2516 1902-5-16

Hymenophyllaceae
GH: 02580975 Cephalomanes auriculatum Bosch Philippines: Mindanao: Mt. Apo, S. E. Mindanao R. S. Williams 2485 1905-3-28

GH: 02552282 Hymenophyllum crispatum Wallich ex Hook. & Grev. Philippines: Mindanao: Mt. Apo, S. E. Mindanao R. S. Williams 2496 bis 1905-3-31

Hypnaceae
FH: 00059359 Ctenidium mindanense R. S. Williams Philippines: Mindanao, Sax River, on tree R. S. Williams 2392 1905-2
FH: 00841489 Hypnum plicatulum (Lindberg) A. Jaeger Canada: Yukon Territory [no additional data] R. S. Williams

FH: 00213419 Isopterygium saxense R. S. Williams Philippines: Mindanao: Southwest Mindanao, Lax river, at ... R. S. Williams 3164 1905-2
FH: 00220500 Stereodontopsis flagellifera R. S. Williams Philippines: Southwest Mindanao, Lax River R. S. Williams 2387 1905-2
Icacinaceae
GH: 02588067 Gomphandra flavicarpa (Elmer) Merrill Philippines: Mindanao Island: Todaya, Mt. Apo, S. E. Mind... R. S. Williams 2582 1905-3-28

GH: 02590994 Gonocaryum calleryanum (Baillon) Beccari Philippines: Bataan Lamao River, Mt. Mariveles; Central Luzon R. S. Williams 493 1904-1-3

A: 02590960 Gonocaryum cognatum Elmer Philippines: Davao S.E. Mindanao R. S. Williams 2847

A: 02590959 Gonocaryum cognatum Elmer Philippines: Davao Santa Cruz; S.E. Mindanao R. S. Williams 1905

A: 02589167 Miquelia celebica Blume Philippines: Davao Santa Cruz R. S. Williams 2736 1905

Icmadophilaceae
FH: 00913902 Icmadophila ericetorum (Linnaeus) Zahlbruckner Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
Juncaceae
GH: 02396754 Luzula comosa laxa Buchenau USA: Montana [data not captured] R. S. Williams 1892-6-15

GH: 02117406 Luzula glabrata Desvaux USA: Montana [data not captured] R. S. Williams 1892-9-8

Jungermanniaceae
FH: 00495374 Barbilophozia barbata (Schreber) Loeske USA: Montana [data not captured] R. S. Williams 1897-4-20

Lamiaceae
GH: 00000751 Acrocephalus indicus (N. L. Burman) Kuntze Philippines: Davao del Sur Santa Cruz: R. S. Williams 2954 1905-7-1

GH: 00000751 Acrocephalus spicatus C. B. Robinson Philippines: Davao del Sur Santa Cruz: R. S. Williams 2954 1905-7-1

Lauraceae
A: 02538690 Cryptocarya ampla Merrill Philippines: Davao Santa Cruz R. S. Williams 2851 1905-5-23

GH: 02538685 Cryptocarya ampla Merrill Philippines: Davao del Sur Santa Cruz: [no additional data] R. S. Williams 2851 1905-5-23

A: 02538731 Cryptocarya ferrea Blume Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 685 1904-3-10

GH: 02538809 Cryptocarya palawanensis Merrill Philippines: Mindanao Island: Sax River, Prov. Zamboanga R. S. Williams 2301 1905-2-4

GH: 02500042 Litsea fulva Fernandez-Villar Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 528 1904-1-18

GH: 02500157 Litsea hutchinsonii Merrill Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 258 1903-11-27

GH: 02500238 Litsea micrantha Merrill Philippines: Mindanao Island: Sax River, Zamboanga R. S. Williams 2141 1905-2-14

A: 02500231 Litsea micrantha Merrill Philippines: Davao [no additional data] R. S. Williams 2989 1905

GH: 02500291 Litsea perrottetii Fernandez-Villar Philippines: Davao del Sur Santa Cruz: Prov. Davao R. S. Williams 2804 1905-5-11

GH: 02500313 Litsea philippinensis Merrill Philippines: Bataan Mt. Marivels R. S. Williams 619 1903-2-17

Lecanoraceae
FH: 00941163 Lecanora alphoplaca (Wahlenberg) Acharius USA: Alaska [no additional data] R. S. Williams 1898
FH: 01140453 Lecanora bockii (Fries) Rodig Canada: Yukon Territory [no additional data] R. S. Williams
FH: 01140456 Lecanora calcarea (Linnaeus) Sommerfelt Canada: Yukon Territory [no additional data] R. S. Williams
FH: 01140457 Lecanora campestris (Schaerer) Hue Canada: Yukon Territory [no additional data] R. S. Williams
FH: 00372933 Lecanora campestris (Schaerer) Hue USA: Alaska [data not captured] R. S. Williams 1898

FH: 01140460 Lecanora castanea (Hepp) Th. Fries Canada: Yukon Territory [data not captured] R. S. Williams
FH: 01140470 Lecanora crassa (Hudson) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-3
FH: 00941163 Lecanora crassa (Hudson) Acharius USA: Alaska [no additional data] R. S. Williams 1898
FH: 01140543 Lecanora epibryon (Acharius) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1898-7
FH: 00451207 Lecanora epibryon (Acharius) Acharius USA: Alaska [data not captured] R. S. Williams 1899

FH: 01140491 Lecanora lentigera (Weber) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-13
FH: 01140511 Lecanora pallida (Schreber) Rabenhorst Canada: Yukon Territory [data not captured] R. S. Williams 1898-4
FH: 01140512 Lecanora pallida (Schreber) Rabenhorst Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01140526 Lecanora rubina (Villars) Acharius USA: Montana [data not captured] R. S. Williams 1893-5
FH: 01140540 Lecanora schleicheri (Acharius) Nylander Canada: Yukon Territory [no additional data] R. S. Williams
FH: 01140530 Lecanora sp. Canada: Yukon Territory [data not captured] R. S. Williams 1899-4
FH: 01140562 Lecanora subfusca (Linnaeus) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1899-4
FH: 00941166 Lecanora subfusca argentata Acharius Canada: Yukon Territory Dawson (Yukon Territory): Dawson, Alaska R. S. Williams 1898
FH: 00452122 Lecanora subfusca rugosa Nylander USA: Alaska [no additional data] R. S. Williams 1898

FH: 00941166 Lecanora thamnoplaca Tuckerman Canada: Yukon Territory Dawson (Yukon Territory): Dawson, Alaska R. S. Williams 1898
FH: 00913907 Lecanora ventosa (Linnaeus) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 58 1898-5
FH: 00476097 Pyrrhospora cinnabarina (Sommerfelt) M. Choisy Canada: British Columbia [data not captured] R. S. Williams 1898-4

FH: 00476097 Ramboldia cinnabarina (Sommerfelt) Kalb, Lumbsch & Elix Canada: British Columbia [data not captured] R. S. Williams 1898-4

Lecideaceae
FH: 00419418 Bacidia De Notaris USA: Alaska [data not captured] R. S. Williams

FH: 00419846 Bacidia sabuletorum (Schreber) Lettau USA: Montana [data not captured] R. S. Williams 1893

FH: 00419847 Bacidia sabuletorum (Schreber) Lettau USA: Montana [data not captured] R. S. Williams 1893

Lecythidaceae
GH: 02438536 Barringtonia asiatica (Linn) Kurz Philippines: Mindanao: Santa Cruz, Prov. Davao R. S. Williams 2806 1905-4-29

GH: 02438578 Barringtonia racemosa (Linnaeus) Sprengel Philippines: Mindanao Island: Santa Cruz, Prov. Davao, S.... R. S. Williams 2786 1905-4-22

Lembophyllaceae
FH: 00060607 Elmeriobryum brotheri R. S. Williams ex Brotherus Philippines: Benguet Northern Luzon Island, Baguio, R. S. Williams 1728 1904-9
Lentibulariaceae
GH: 01977304 Utricularia bifida Linnaeus Philippines: Benguet Baguio. Northern Luzon. R. S. Williams 1015 1904-10-24

Leskeaceae
FH: 00843727 Lescuraea incurvata (Hedwig) E. Lawton USA: Montana [data not captured] R. S. Williams 342 1896-7-23

FH: 00843953 Leskea obscura Hedwig USA: New York New York City: [data not captured] R. S. Williams 1899-11-6

Lichinaceae
FH: 00913887 Ephebe lanata (Linnaeus) Vainio Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 91 1898-7
Lindsaeaceae
GH: 02286570 Lindsaea fissa Copeland Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 782 1904-3-22

GH: 02286612 Lindsaea merrillii Copeland Philippines: Benguet Antamok R. S. Williams 1484 1904-10-22

GH: 02286972 Odontosoria retusa (Cavanilles) J. Smith Philippines: Bataan Lamas Riv., Mt. Mariveles R. S. Williams 150 1903-11-16

Lycopodiaceae
GH: 02412565 Lycopodiella andicola B. Øllgaard Bolivia: Santa Cruz Bergpass [illegible] San Mateo, Comarapa R. S. Williams 1391 1901-12-26

GH: 00021609 Lycopodium williamsii F. E. Lloyd & Underwood Bolivia: New Brazil, 5500 feet R. S. Williams 1393 1902-6-14

Malpighiaceae
GH: 02536692 Tristellateia australasiae A. Richard Philippines: Davao del Sur Santa Cruz: [no additional data] R. S. Williams 2967 1905-6-2

Marantaceae
GH: 02245328 Donax canniformis (G. Forster) K. Schumann Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 4 1903-11-2

Marattiaceae
GH: 02578714 Angiopteris angustifolia C. Presl Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 1903-12-15

Marsileaceae
GH: 02282172 Marsilea sp. Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 300 1903-12-3

Meesiaceae
FH: 00824426 Paludella squarrosa (Hedwig) Bridel Canada: Yukon Territory [data not captured] R. S. Williams 1899-6-23

FH: 01091761 Paludella squarrosa (Hedwig) Bridel Canada: British Columbia Lake Linderman R. S. Williams 1898-5-19
Megasporaceae
FH: 00941166 Lobothallia alphoplaca (Wahlenberg) Hafellner Canada: Yukon Territory Dawson (Yukon Territory): Dawson, Alaska R. S. Williams 1898
FH: 00941163 Lobothallia alphoplaca (Wahlenberg) Hafellner USA: Alaska [no additional data] R. S. Williams 1898
Melastomataceae
GH: 02270005 Astronia cumingiana S. Vidal Philippines: Benguet Sablan, Prov. Benguet, Northern Luzon R. S. Williams 1556 1904-11-18

GH: 02272573 Medinilla annulata C.B.Rob. Philippines: Benguet Baguio, Prov. Benguet, Northern Luzon R. S. Williams 1113 1904-6-24

GH: 02272581 Medinilla astronioides Triana Philippines: Mindanao Island: Sax River, Prov. Zamboanga,... R. S. Williams 2146 1905-2

GH: 02272719 Medinilla dolichophylla Merr. Philippines: Benguet Baguio, Prov. Benguet, Northern Luzon R. S. Williams 1309 1904-10-5

GH: 02272854 Medinilla involucrata Merr. Philippines: Zamboanga del Sur Sax River, Prov. Zamboanga, Mindanao R. S. Williams 2114 1905-2-5

GH: 02273058 Medinilla pachygona C.B.Robinzon Philippines: Benguet Baguio, Prov. Benguet, Northern Luzon R. S. Williams 952 1904-9-20

GH: 02273096 Medinilla pendula Merrill Philippines: Benguet Baguio, Prov. Benguet, Northern Luzon R. S. Williams 947 1904-7-30

GH: 02273261 Medinilla venosa (Blume) Blume Philippines: Zamboanga del Sur Sax River, Prov. Zamboanga, Mindanao R. S. Williams 2412 1905-2

GH: 01771261 Melastoma sp. Philippines: Davao Santa Cruz R. S. Williams 2721 1905-4-19

GH: 01771262 Melastoma sp. Philippines: Zamboanga: Sax River R. S. Williams 2313 1905-2-26

A: 01771268 Melastoma sp. Philippines: Mindanao: Mt. Apo R. S. Williams 1905

GH: 00073207 Sarcopyramis delicata C. B. Robinson Philippines: Benguet Mount Santo Tomas, Luzon Island, 6500 feet R. S. Williams 1276 1904-7-1

GH: 00073207 Sarcopyramis napalensis Wallich Philippines: Benguet Mount Santo Tomas, Luzon Island, 6500 feet R. S. Williams 1276 1904-7-1

Meteoriaceae
FH: 00059060 Barbella elongata R. S. Williams Philippines: Benguet Mt. Santo Tomas, 2000 m R. S. Williams 1694 1904-10
FH: 00220491 Squamidium diversicoma (Hampe) Brotherus Bolivia: Rio Pelichuco R. S. Williams 2856 1902-4-30
FH: 00220491 Squamidium diversifolium R. S. Williams Bolivia: Rio Pelichuco R. S. Williams 2856 1902-4-30
Mimosaceae
GH: 00058600 Abarema elliptica (Blume) Kostermans Philippines: Zamboanga del Norte Sax River, Mindanao, 400 ft. R. S. Williams 2094 1905-2-4

GH: 02232829 Adenanthera intermedia Merrill Philippines: Davao Santa Cruz R. S. Williams 2881 1905-6-10

GH: 02253148 Albizia procera (Roxburgh) Bentham Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 373 1903-12-25

GH: 02253157 Albizia procera (Roxburgh) Bentham Philippines: Benguet Antamok R. S. Williams 1286 1904-7-17

GH: 02253160 Albizia procera (Roxburgh) Bentham Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 726 1904-3-8

A: 02253176 Albizia retusa Bentham Philippines: Davao Santa Cruz R. S. Williams 2741 1905

GH: 02234073 Archidendron clypearia casai (Blanco) I. C. Nielsen Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 688 1904-3-10

GH: 00058600 Archidendron ellipticum cordifoliolatum I. C. Nielsen Philippines: Zamboanga del Norte Sax River, Mindanao, 400 ft. R. S. Williams 2094 1905-2-4

GH: 02234445 Leucaena leucocephala (Lamarck) de Wit Philippines: Laguna Los Banos: [no additional data] R. S. Williams 2047 1905-1-16

GH: 02234660 Pithecellobium dulce (Roxburgh) Bentham Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 380 1903-12-30

GH: 00058600 Pithecellobium ellipticum (Blume) Hasskarl Philippines: Zamboanga del Norte Sax River, Mindanao, 400 ft. R. S. Williams 2094 1905-2-4

GH: 00058600 Pithecellobium fasciculatum Bentham Philippines: Zamboanga del Norte Sax River, Mindanao, 400 ft. R. S. Williams 2094 1905-2-4

Mniaceae
FH: 00845912 Cyrtomnium hymenophyllum (Bruch & Schimper) Holmen Canada: Yukon Territory [data not captured] R. S. Williams 1898-6-3

FH: 00845770 Mnium blyttii Bruch & Schimper USA: Montana [data not captured] R. S. Williams 1896-6

FH: 00845772 Mnium blyttii Bruch & Schimper USA: Montana [data not captured] R. S. Williams 1895-7-10

FH: 00845773 Mnium blyttii Bruch & Schimper USA: Montana [data not captured] R. S. Williams 1896-6

FH: 00845774 Mnium blyttii Bruch & Schimper USA: Montana [data not captured] R. S. Williams 1897-7-16

FH: 00845775 Mnium blyttii Bruch & Schimper USA: Montana [data not captured] R. S. Williams 1896-6

FH: 00845776 Mnium blyttii Bruch & Schimper USA: Montana [data not captured] R. S. Williams 304 1895-7-10

FH: 00846085 Mnium lycopodioides orthorrhynchum (Hartman) Wijk & Margadant USA: Montana [data not captured] R. S. Williams 1892-8-31

FH: 00847813 Plagiomnium affine (Blandow ex Funck) T. J. Koponen USA: Montana [data not captured] R. S. Williams 1896-6-20

FH: 00848329 Plagiomnium cuspidatum (Hedwig) T. J. Koponen USA: Montana [data not captured] R. S. Williams 1896-6-26

FH: 00848383 Plagiomnium drummondii (Bruch & Schimper) T. J. Koponen USA: Montana [data not captured] R. S. Williams 1895-6-12

FH: 00848384 Plagiomnium drummondii (Bruch & Schimper) T. J. Koponen USA: Montana [data not captured] R. S. Williams 1895-6-12

FH: 00848385 Plagiomnium drummondii (Bruch & Schimper) T. J. Koponen USA: Montana [data not captured] R. S. Williams 1895-6-12

FH: 00848614 Plagiomnium rostratum (Schrader) T. J. Koponen USA: Montana [data not captured] R. S. Williams 1896-8-1

FH: 00848615 Plagiomnium rostratum (Schrader) T. J. Koponen USA: Montana [data not captured] R. S. Williams 1896-7-29

FH: 00848627 Plagiomnium venustum (Mitten) T. J. Koponen USA: Montana [data not captured] R. S. Williams 1893-6-8

FH: 00902978 Rhizomnium pseudopunctatum (Bruch & Schimper) T. J. Koponen USA: Montana [data not captured] R. S. Williams 389 1896-5-7
FH: 00900212 Rhizomnium punctatum (Hedwig) T. J. Koponen USA: Montana [data not captured] R. S. Williams 1893-4-29
FH: 00995243 Roellia lucida Kindberg USA: Montana Along the Great Northern Railway, near Essex R. S. Williams 1896-8-17
FH: 00995244 Roellia lucida Kindberg USA: Montana Along the Great Northern Railway, near Essex R. S. Williams 1896-8-17
FH: 00995253 Roellia lucida Kindberg USA: Montana Along the Great Northern Railway, near Essex R. S. Williams 1896-8-17
FH: 00995253 Roellia roellii (Brotherus) A. L. Andrews ex H. A. Crum USA: Montana Along the Great Northern Railway, near Essex R. S. Williams 1896-8-17
Myrsinaceae
GH: 02439821 Aegiceras corniculatum (Linnaeus) Blanco Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 322 1903-12-3

GH: 02439820 Aegiceras corniculatum (Linnaeus) Blanco Philippines: Davao Santa Cruz R. S. Williams 2743 1905-4-24

GH: 02439845 Aegiceras floridum Roemer & J. H. Schultes Philippines: Davao Santa Cruz R. S. Williams 2744 1905-5-2

GH: 02440858 Ardisia marginata Blume Philippines: Benguet Baguio R. S. Williams 979 1904-10-12

A: 02441019 Ardisia scabrida Mez Philippines: Mindanao Island: Todaya, Mt. Apo, S. E. Mind... R. S. Williams 2601 1905

GH: 02441118 Ardisia squamulosa C. Presl Philippines: Laguna Los Banos R. S. Williams 2050 1905-1-15

GH: 02441587 Discocalyx cybianthoides (A.DC.) Mez Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 602 1903-2-13

GH: 02441652 Discocalyx philippinensis (A.DC.) Mez Philippines: Bataan Upper Lamao Rit.; Mt. Mariveles R. S. Williams 614 1904-2-24

GH: 02442279 Embelia whitfordii Merr. Philippines: Benguet Baguio R. S. Williams 993 1904-7-24

A: 02443371 Maesa cumingii Mez Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 526 1904-1-20

GH: 02443355 Maesa cumingii Mez Philippines: Zamboanga Sibugay Sax River R. S. Williams 2099 1905-2-9

GH: 02443402 Maesa denticulata Mez Philippines: Zamboanga Sibugay Sax River R. S. Williams 2416 1905-3-7

GH: 02443401 Maesa denticulata Mez Philippines: Zamboanga: Sax River R. S. Williams 2098 1905-3-7

GH: 02443448 Maesa denticulata Mez Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 530 1904-1-23

A: 02600144 Myrsine avenis (Blume) A. de Candolle Philippines: Mindanao: Todaya, Mt. Apo R. S. Williams 2603 1905

GH: 02600129 Myrsine avenis (Blume) A. de Candolle Philippines: Benguet Mount Santo Tomas R. S. Williams 1346 1904-10-28

Myrtaceae
GH: 00069629 Eugenia angulata C. B. Robinson Philippines: Sax River, Zamboanga Province, Mindanao Isla... R. S. Williams 2164 1905-2-16

GH: 00069636 Eugenia brittoniana C. B. Robinson Philippines: Benguet Bagiuo, Luzon Island R. S. Williams 1464 1904-11-6

A: 00069799 Eugenia subsessilis C. B. Robinson Philippines: Davao Santa Cruz, southeast Mindanao Island R. S. Williams 2748 1905-5-3

GH: 00069827 Eugenia williamsii C. B. Robinson Philippines: Sax River, Zamboanga Province, Mindanao Isla... R. S. Williams 2128 1905-2-18

A: 02445289 Leptospermum amboinense Blume Philippines: Mindanao: Mt. Apo, S. E. Mindanao R. S. Williams 2530 1905

A: 00069799 Syzygium subsessile (C. B. Robinson) Merrill Philippines: Davao Santa Cruz, southeast Mindanao Island R. S. Williams 2748 1905-5-3

Neckeraceae
FH: 00213106 Himantocladium nanum R. S. Williams Philippines: Mindanao, Todayo, Mount Apo, on tree, 850 m. R. S. Williams 3156 1905-4
FH: 00284418 Himantocladium scrobiculatum (Nees) E. B. Bartram Philippines: Bataan Lamas River R. S. Williams 849 1903-11
FH: 00213895 Neckera luzonensis R. S. Williams Philippines: Benguet Northern Luzon, Mount Santo Tomas, on trunks... R. S. Williams 1698 1904-10
FH: 00284409 Neckeropsis andamana (Müller Halle) M. Fleischer Philippines: Bataan Lamas River R. S. Williams 850 1903-11
FH: 00284410 Neckeropsis andamana (Müller Halle) M. Fleischer Philippines: Bataan Lamas River R. S. Williams 850 1903-11
FH: 00284410 Neckeropsis crinita (Griffith) M. Fleischer Philippines: Bataan Lamas River R. S. Williams 850 1903-11
FH: 00284418 Neckeropsis exserta (Hooker ex Schwägrichen) Brotherus Philippines: Bataan Lamas River R. S. Williams 849 1903-11
FH: 00284417 Neckeropsis exserta scrobiculata (Nees) Touw Philippines: Bataan Lamas River R. S. Williams 849 1903-11
FH: 00284418 Neckeropsis exserta scrobiculata (Nees) Touw Philippines: Bataan Lamas River R. S. Williams 849 1903-11
FH: 00284409 Neckeropsis gracilente (Bosch & Sande Lacoste) M. Fleischer Philippines: Bataan Lamas River R. S. Williams 850 1903-11
FH: 00284417 Neckeropsis scrobiculata (Nees) Brotherus Philippines: Bataan Lamas River R. S. Williams 849 1903-11
FH: 00213106 Pinnatella kuehliana (Bosch & Sande Lacoste) M. Fleischer Philippines: Mindanao, Todayo, Mount Apo, on tree, 850 m. R. S. Williams 3156 1905-4
Ochrolechiaceae
FH: 00455603 Ochrolechia pallescens (Linnaeus) A. Massalongo USA: Montana [data not captured] R. S. Williams 1893-5

FH: 00888099 Ochrolechia pallescens (Linnaeus) A. Massalongo USA: Montana [data not captured] R. S. Williams 1893-5
FH: 00455787 Ochrolechia upsaliensis (Linnaeus) A. Massalongo USA: Montana [data not captured] R. S. Williams 1893-5

Oleaceae
A: 02458666 Jasminum simplicifolium australiense P. S. Green Philippines: Jolo R. S. Williams 3111 1905

GH: 02458764 Ligustrum cumingianum Decaisne Philippines: Benguet Mount Santo Tomas R. S. Williams 1544 1904-11-29

Onagraceae
GH: 01674006 Chamerion latifolium (Linnaeus) Holub USA: Montana Stanton Lake R. S. Williams 1894-8-1

Opiliaceae
GH: 02296083 Champereia manillana (Blume) Merrill Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 637 1904-2-29

GH: 02296082 Champereia manillana (Blume) Merrill Philippines: Davao Santa Cruz R. S. Williams 2725 1905-4-21

GH: 02296112 Champereia manillana (Blume) Merrill Philippines: Bataan Lamao River, Mt. Mariveles; Central Luzon R. S. Williams 541 1904-1-29

Orchidaceae
GH: 02153975 Acoridium cobbianum (Reichenbach f.) Rolfe Philippines: Baguio: [no additional data] R. S. Williams 1938 1904-9-23

AMES: 00000065 Acoridium williamsii Ames Philippines: Benguet Luzon Island, Trinidad R. S. Williams 1939 1904-9-28

GH: 00000066 Acoridium williamsii Ames Philippines: Benguet Luzon Island, Trinidad R. S. Williams 1939 1904-9-28

AMES: 00001062 Acoridium williamsii Ames Philippines: Benguet Luzon Island, Trinidad R. S. Williams 1939 1904-9-28

GH: 00217884 Adenostylis luzonensis Ames Philippines: Benguet Between Baguio and Sablon, northen Luzon R. S. Williams 1924 1904-11

AMES: 02340742 Appendicula undulata longicalcarata (Rolfe) Ames Philippines: Mindanao Island: Sax River, Prov. Zamboanga R. S. Williams 2331 1905-2-5

AMES: 02385849 Bulbophyllum dasypetalum Rolfe ex Ames Philippines: Bataan Upper Lamao River, Mt. Mariveles R. S. Williams 429 1904-1-2

AMES: 02385927 Bulbophyllum exile Ames Philippines: Mindanao Island: Mt. Apo, S. E. Mindanao R. S. Williams 2563 1905-4-1

AMES: 02384206 Bulbophyllum whitfordii Rolfe Philippines: Davao del Sur Santa Cruz: Davao, S. E. Mindanao R. S. Williams 2915 1905-5-15

AMES: 02029454 Calypso bulbosa (Linnaeus) Oakes USA: Montana Columbia Falls R. S. Williams 1893-5-16

AMES: 02029475 Calypso bulbosa (Linnaeus) Oakes USA: Montana Columbia Falls R. S. Williams 44 1893-5-16

GH: 02388528 Cephalantheropsis halconensis (Ames) S. S. Ying Philippines: Baguio: [no additional data] R. S. Williams 1947 1904-10-25

AMES: 02094197 Cestichis forbesii Ames Philippines: Baguio: [no additional data] R. S. Williams 1941 1904-10-9

AMES: 02093510 Coelogyne chloroptera Reichenbach f. Philippines: Baguio: [no additional data] R. S. Williams 1953 1904-11-6

AMES: 00102433 Cohniella nuda (Bateman ex Lindley) Christenson Panama: Cana and vicinity, 2000-6500 feet R. S. Williams 975 1908-4-4

AMES: 00090432 Cohniella nuda nuda Christenson Panama: Cana and vicinity R. S. Williams 975 1908-4-4

AMES: 00083085 Cohniella nuda nuda Christenson Panama: Cana and vicinity R. S. Williams 975 1908-4-4

AMES: 00083084 Cohniella nuda nuda Christenson Panama: Cana and vicinity, 2000-6500 feet R. S. Williams 975 1908-4-4

AMES: 01938692 Corallorhiza striata Lindley USA: Montana Columbia Falls R. S. Williams 1033 1894-6-21

GH: 00104071 Corymborkis confusa Ames Philippines: Sax River, Province Zamboanga, Mindanao, 300... R. S. Williams 2153 1905

AMES: 00104063 Corymborkis confusa Ames Philippines: Zamboanga, Mindanao, Zax River, 300 ft R. S. Williams 2153 1905

AMES: 01581898 Cypripedium montanum Douglas ex Lindley USA: Montana Columbia Falls R. S. Williams 1894-7-12

AMES: 02065047 Cypripedium parviflorum Salisbury USA: Montana Columbia Falls R. S. Williams 1895-6-14

AMES: 00074970 Dendrobium chameleon Ames Philippines: Benguet R. S. Williams 1940 1904-9-30

AMES: 00074969 Dendrobium chameleon Ames Philippines: Benguet R. S. Williams 1940 1904-9-30

AMES: 00090201 Dendrobium multiramosum Ames Philippines: Benguet Kias Hill, Northern Luzon R. S. Williams 1934 1904-9

AMES: 02336875 Dendrobium secundum (Blume) Lindley Philippines: Bataan Lamao River, Mariveles R. S. Williams 765 1904-3-7

AMES: 02153183 Dendrochilum arachnites Reichenbach f. Philippines: Benguet Mount Santo Tomas R. S. Williams 1948 1904-10-29

AMES: 02153240 Dendrochilum cobbianum Reichenbach f. Philippines: Baguio: [no additional data] R. S. Williams 1950 1904-11-8
AMES: 02153238 Dendrochilum cobbianum Reichenbach f. Philippines: Baguio: [no additional data] R. S. Williams 1938 1904-9-23

AMES: 02153510 Dendrochilum latifolium Lindley Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 666 1904-2-24

AMES: 00018840 Dendrochilum longispicatum Ames Philippines: Benguet Baguio, Luzon Island R. S. Williams 1942 1904-10-9

AMES: 02153806 Dendrochilum tenellum (Nees & Meyen) Ames Philippines: Bataan Upper Lamao River, Mt. Mariveles R. S. Williams 427 1904-1-2

AMES: 02153805 Dendrochilum tenellum (Nees & Meyen) Ames Philippines: Bataan Upper Lamao River, Mt. Mariveles R. S. Williams 758 1904-3-24

AMES: 02123012 Encyclia cordigera (Kunth) Dressler Panama: Penonome and Vicinity R. S. Williams 440 1908-2-29

AMES: 02127365 Eria polyura Lindley Philippines: Bataan Upper Lamao River, Mt. Mariveles R. S. Williams 433 1904-1-2

AMES: 02125709 Flickingeria chrysographata (Ames) A. D. Hawkes Philippines: Bataan [no data available] R. S. Williams 764

AMES: 02341199 Geodorum nutans (C. Presl) Ames Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 393 1903-12-25

AMES: 02028026 Goodyera oblongifolia Rafinesque USA: Montana Columbia Falls R. S. Williams 1894-8-20

AMES: 00099884 Habenaria intrudens Ames Philippines: Benguet Baguio, Luzon Island R. S. Williams 1933 1904-10-6

AMES: 01946981 Habenaria malintana (Blanco) Merrill Philippines: Luzon: Between Baguio and Sablan, Prov. Beng... R. S. Williams 1927 1904-11-19

AMES: 01946967 Habenaria malintana (Blanco) Merrill Philippines: Luzon: Lamao River, Mt. Mariveles, Prov. Bat... R. S. Williams 1903-11-25

GH: 01945016 Habenaria peloriodes Parish & H. Gustav Reichenbach Philippines: Between Baguio and Sablon, Prov. Benguet, No... R. S. Williams 1927 1904-11-19

AMES: 00082690 Habenaria williamsii Schlechter Bolivia: 5000 ft R. S. Williams 309 1902-2
GH: 01948834 Herminium lanceum (Thunberg ex Swartz) Vuijk Philippines: Luzon: [no additional data] R. S. Williams 1945 1904-9-11

AMES: 01948826 Herminium lanceum (Thunberg ex Swartz) Vuijk Philippines: Luzon: [no additional data] R. S. Williams 1945 1904-9-11

AMES: 00100761 Limnorchis leptoceratitis Rydberg Canada: Yukon Territory R. S. Williams 1899-8-25

AMES: 02094197 Liparis bootanensis Griffith Philippines: Baguio: [no additional data] R. S. Williams 1941 1904-10-9

AMES: 02094079 Liparis caespitosa (Thouars) Lindley Philippines: Northern Philippines. Upper Lamao River, Mt.... R. S. Williams 428 1904-1-2

AMES: 02094078 Liparis caespitosa (Thouars) Lindley Philippines: Baguio: [no additional data] R. S. Williams 1954 1904-11-26

AMES: 02094119 Liparis condylobulbon H. G. Reichenbach Philippines: Baguio: [no additional data] R. S. Williams 1946 1904-9-30

AMES: 02094186 Liparis elmeri Ames Philippines: Benguet Mount Santo Tomas R. S. Williams 1928 1904-10-12

GH: 02094181 Liparis elmeri Ames Philippines: Benguet Mount Santo Tomas R. S. Williams 1928 1904-10-12

GH: 02094220 Liparis merrillii (Ames) Schlechter Philippines: Bataan Upper Lamao River R. S. Williams 430 1904-1-3

AMES: 02051325 Listera cordata (Linnaeus) R. Brown USA: Montana Columbia Falls R. S. Williams 1895-6-24

AMES: 00101775 Malaxis williamsii Ames Philippines: Benguet Baguio, Luzon Island R. S. Williams 1109 1904-6-21

AMES: 00101747 Microstylis quadriloba Ames Philippines: Benguet Baguio, Luzon Island R. S. Williams 1108 1904-6-13

AMES: 01939771 Microtis unifolia (G. Forster) H. G. Reichenbach Philippines: Baguio: [no additional data] R. S. Williams 1935 1904-9-15

GH: 01939767 Microtis unifolia (G. Forster) H. G. Reichenbach Philippines: Baguio: [no additional data] R. S. Williams 1935 1904-9-15

AMES: 00101885 Nervilia discolor (Blume) Schlechter Philippines: Davao Santa Cruz, Southeast Mindanao Island, 400 f... R. S. Williams 3088 1905-5-1

AMES: 00101920 Notylia panamensis Ames Panama: Marraganti and vicinity, 10-200 feet R. S. Williams 977 1908-4-3

AMES: 00101921 Notylia panamensis Ames Panama: Marraganti and vicinity, 10-200 feet R. S. Williams 977 1908-4-3

AMES: 00090432 Oncidium ebrachiatum Ames & C. Schweinfurth Panama: Cana and vicinity R. S. Williams 975 1908-4-4

AMES: 00102433 Oncidium ebrachiatum Ames & C. Schweinfurth Panama: Cana and vicinity, 2000-6500 feet R. S. Williams 975 1908-4-4

AMES: 00083085 Oncidium ebrachiatum Ames & C. Schweinfurth Panama: Cana and vicinity R. S. Williams 975 1908-4-4

AMES: 00083084 Oncidium ebrachiatum Ames & C. Schweinfurth Panama: Cana and vicinity, 2000-6500 feet R. S. Williams 975 1908-4-4

GH: 01945735 Peristylus intrudens (Ames) Ormerod Philippines: Luzon: Baguio Prov. Benguet, Northern Luzon R. S. Williams 1904-10-6

AMES: 01945745 Peristylus monticola (Ridley) Seidenfaden Philippines: Luzon: Baguio, Prov. Benguet R. S. Williams 1904-9-17

AMES: 00102888 Phaius calanthoides Ames Philippines: Benguet Baguio, Luzon Island R. S. Williams 1947 1904-10-25

AMES: 02329261 Phalaenopsis equestris (Schauer) Reichenbach f. Philippines: Bataan Lamao River. Mt. Mariveles. R. S. Williams 376 1903-12-25

GH: 02174215 Pholidota imbricata Lindley Philippines: Benguet Twin Peaks R. S. Williams 1956 1904-9-8

AMES: 02063949 Platanthera elegans Lindley USA: Montana Columbia Falls R. S. Williams 1034 1894-8-18

AMES: 02046651 Platanthera orbiculata (Pursh) Lindley USA: Montana Whitefish Lake R. S. Williams 1892-8-25

AMES: 02050288 Platanthera stricta Lindley USA: Montana Summit, G. N. Ry. R. S. Williams 1894-7-25

AMES: 00074868 Pleurothallis broadwayi Ames Panama: Cana & vicinity R. S. Williams 976 1908-4

AMES: 00074117 Pleurothallis canae Ames Panama: Cana and vicinity R. S. Williams 971 1908-4-27

AMES: 00083276 Pleurothallis canae Ames Panama: Cana and vicinity R. S. Williams 971 1908-4-27

AMES: 00074649 Pleurothallis praegrandis Ames Panama: Cana and vicinity, 6000 ft altitude R. S. Williams 973 1908

AMES: 00074648 Pleurothallis praegrandis Ames Panama: Cana and vicinity, 6000 ft altitude R. S. Williams 973 1908

AMES: 00074117 Pleurothallis segoviensis H. G. Reichenbach Panama: Cana and vicinity R. S. Williams 971 1908-4-27

AMES: 00074868 Pleurothallis williamsii Ames Panama: Cana & vicinity R. S. Williams 976 1908-4

AMES: 00083501 Pleurothallis williamsii Ames Panama: Cana & vicinity R. S. Williams 976 1908-4

AMES: 00101885 Pogonia discolor Blume Philippines: Davao Santa Cruz, Southeast Mindanao Island, 400 f... R. S. Williams 3088 1905-5-1

AMES: 02123651 Prosthechea cochleata (Linnaeus) W. E. Higgins Panama: Cana and Vicinity R. S. Williams 974 1908-4-17

AMES: 00103815 Robiquetia vanoverberghii Ames Philippines: Benguet Mount Santo Tomas, Luzon Island R. S. Williams 1952 1904-10-28

AMES: 02329506 Robiquetia vanoverberghii Ames Philippines: Benguet Mount Santo Tomas R. S. Williams 1952 1904-10-28

AMES: 02329507 Robiquetia vanoverberghii Ames Philippines: Benguet Mount Santo Tomas R. S. Williams 1952 1904-10-28

AMES: 02387647 Spathoglottis plicata Blume Philippines: Benguet Between Baguio and Sablon R. S. Williams 1925 1904-11-19

AMES: 00104897 Stelis endresii H. G. Reichenbach Panama: Cana and vicinity R. S. Williams 972 1908-4-27

AMES: 00084350 Stelis endresii H. G. Reichenbach Panama: Cana and vicinity R. S. Williams 972 1908-4-27

AMES: 00084351 Stelis endresii H. G. Reichenbach Panama: Cana and vicinity R. S. Williams 972 1908-4-27

AMES: 00104897 Stelis parvibracteata Ames Panama: Cana and vicinity R. S. Williams 972 1908-4-27

AMES: 00084350 Stelis parvibracteata Ames Panama: Cana and vicinity R. S. Williams 972 1908-4-27

AMES: 00084351 Stelis parvibracteata Ames Panama: Cana and vicinity R. S. Williams 972 1908-4-27

AMES: 00084487 Stelis weberbaueri Schlechter Panama: Cana and vicinity R. S. Williams 970 1908-4-27

AMES: 00105042 Stelis williamsii Ames Panama: Cana and vicinity R. S. Williams 970 1908-4-27

AMES: 00101780 Taeniophyllum compactum Ames Philippines: Benguet Baguio, Luzon Island R. S. Williams 1937 1904-9-15

AMES: 02384946 Thelasis micrantha (Brongniart) J. J. Smith Philippines: Zamboanga: Sax River R. S. Williams 2421 1905-2-18

AMES: 01939531 Thelymitra javanica Blume Philippines: Baguio: [no additional data] R. S. Williams 1944 1904-9-21

GH: 01939528 Thelymitra javanica Blume Philippines: Baguio: [no additional data] R. S. Williams 1944 1904-9-21

AMES: 02550521 Thrixspermum hystrix Reichenbach f. Philippines: Baguio: [no additional data] R. S. Williams 1943 1904-10-9

AMES: 00074868 Trichosalpinx dura (Lindley) Luer Panama: Cana & vicinity R. S. Williams 976 1908-4

AMES: 02090392 Zeuxine marivelensis (Ames) Schlechter Philippines: Bataan Luzon, Lamas River, Mt. Mariveles R. S. Williams 627 1903

Orobanchaceae
GH: 01876767 Castilleja flava S. Watson USA: Montana Columbia Falls R. S. Williams 1894-7-18

GH: 02080481 Pedicularis contorta ctenophora (Rydberg) A. Nelson & J. F. Macbride USA: Wyoming Yellowstone Park R. S. Williams 809 1888

Orthotrichaceae
FH: 01108588 Groutiella goniorrhyncha (Dozy & Molk.) E. B. Bartram Philippines: Benguet Baguio R. S. Williams 1753 1904-11
FH: 00213571 Macromitrium benguetense R. S. Williams Philippines: Benguet Northern Luzon Island, Baguio, 1570 m. R. S. Williams 830 1904-10
FH: 00213612 Macromitrium flavopilosum R. S. Williams Panama: Panama, Cana R. S. Williams 1063 1908-4-27
FH: 01108588 Macromitrium goniorrhynchum (Dozy & Molk.) Mitten Philippines: Benguet Baguio R. S. Williams 1753 1904-11
FH: 00213671 Macromitrium robinsonii R. S. Williams Philippines: Bataan Central Luzon Island, Upper Lamas River, on ... R. S. Williams 1760 1904-1
FH: 00825863 Orthotrichum affine Schrader ex Bridel USA: Montana [data not captured] R. S. Williams 306 1895-10-9

FH: 00898076 Orthotrichum macounii Austin Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 617 1898-8-17

FH: 00545842 Orthotrichum rupestre Schleicher ex Schwägrichen USA: Montana [data not captured] R. S. Williams 1895-7-8

Pandanaceae
GH: 02457604 Freycinetia cumingiana Gaudichaud Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 339 1903-12-15

GH: 02457751 Freycinetia williamsii Merrill Philippines: Baguio: [no additional data] R. S. Williams 1013 1904-10-20

GH: 02225569 Pandanus luzonensis Merrill Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 308 1903-12-2

Pannariaceae
FH: 00437282 Fuscopannaria praetermissa (Nylander) P. M. Jørgensen USA: Alaska [data not captured] R. S. Williams 1898-10

FH: 00475253 Psoroma hypnorum (Vahl) Gray USA: Montana [no additional data] R. S. Williams 1888
Papaveraceae
GH: 00010936 Papaver pygmaeum Rydberg USA: Montana Mountain above Stanton Lake R. S. Williams 1894-8-1

Parmeliaceae
FH: 00388187 Ahtiana sphaerosporella (Müller Arg.) Goward USA: Montana near Columbia Falls R. S. Williams 1895-10-10

FH: 01141216 Cetraria cucullata (Bellardi) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-8
FH: 01141217 Cetraria cucullata (Bellardi) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1899-5-14
FH: 01141229 Cetraria islandica (Linnaeus) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-23
FH: 01141268 Cetraria islandica (Linnaeus) Acharius USA: Montana [data not captured] R. S. Williams 1895-4-2
FH: 01141269 Cetraria islandica (Linnaeus) Acharius USA: Montana [data not captured] R. S. Williams 1891-9-25
FH: 01141243 Cetraria nivalis (Linnaeus) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1898-5-8
FH: 01141242 Cetraria nivalis (Linnaeus) Acharius USA: Montana [data not captured] R. S. Williams 1897-6-21
FH: 01141376 Cetraria richardsonii Hooker Canada: Yukon Territory [data not captured] R. S. Williams 1899-5
FH: 01141362 Dactylina arctica (Hooker f.) Nylander Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 00888414 Letharia divaricata (Linnaeus) Hue USA: Montana [data not captured] R. S. Williams 1897-7-20
FH: 00888453 Letharia thamnodes (Flotow) Hue Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 1899-3-18
FH: 01141276 Nephromopsis pallidula (Tuckerman ex Riddle) Riddle Canada: Yukon Territory [data not captured] R. S. Williams 1898-4-24
FH: 01140775 Parmelia conspersa (Ehrhart ex Acharius) Acharius Canada: British Columbia YUKON, Lake Lindeman R. S. Williams 2269 1898-5
FH: 01141779 Usnea florida (Linnaeus) Weber ex F. H. Wiggers Canada: Yukon Territory [data not captured] R. S. Williams 1898-10-2
FH: 00405962 Vulpicida canadensis (Räsänen) Mattsson & M. J. Lai USA: Montana [data not captured] R. S. Williams 1893-4

FH: 00405996 Vulpicida canadensis (Räsänen) Mattsson & M. J. Lai USA: Montana [data not captured] R. S. Williams 1893-4

Peltigeraceae
FH: 01139530 Solorina saccata (Linnaeus) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01139532 Solorina saccata (Linnaeus) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1898-8
FH: 01139531 Solorina saccata spongiosa (Acharius) Nylander Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
Pertusariaceae
FH: 00888110 Pertusaria dactylina (Acharius) Nylander Canada: Yukon Territory [data not captured] R. S. Williams 47 1898-5-12
Philydraceae
AMES: 02090672 Hetaeria oblongifolia Blume Philippines: [no additional data] R. S. Williams 1904-3-4

AMES: 02090671 Hetaeria oblongifolia Blume Philippines: Mindanao: [no additional data] R. S. Williams 1905-2-2

GH: 02090654 Hetaeria oblongifolia Blume Philippines: Mindanao: [no additional data] R. S. Williams 1905-2-2

Phyllanthaceae
A: 02486713 Antidesma edule Merrill Philippines: Bataan [no additional data] R. S. Williams 490 1905

GH: 02486712 Antidesma edule Merrill Philippines: Benguet Sablan R. S. Williams 1372 1904-11-18

GH: 02486754 Antidesma ghaesembilla Gaertner Philippines: Davao Santa Cruz R. S. Williams 2719 1905-4-19

A: 02486977 Antidesma montanum Blume Philippines: Davao [no additional data] R. S. Williams 3008 1905

A: 02487007 Antidesma pleuricum Tulasne Philippines: [no additional data] R. S. Williams 2926 1905

A: 02490495 Aporosa frutescens Blume Philippines: [no additional data] R. S. Williams 3010

GH: 02490514 Aporosa sphaeridiophora Merrill Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 689 1904-3-10

GH: 02490530 Aporosa sphaeridiophora Merrill Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 412 1903-1-3

GH: 02490526 Aporosa sphaeridiophora Merrill Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 581 1903-2-17

GH: 02490525 Aporosa sphaeridiophora Merrill Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 548 1903-1-29

GH: 02490557 Aporosa symplocifolia Merr. Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 498 1904-3-10

GH: 02490563 Aporosa symplocifolia Merr. Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 697 1904

GH: 00062025 Cleistanthus apiculatus C. B. Robbins Philippines: Sax River, Province Zamboanga, Mindanao; 550... R. S. Williams 2356 1905-2-12

GH: 00062025 Cleistanthus myrianthus (Hasskarl) Kurz Philippines: Sax River, Province Zamboanga, Mindanao; 550... R. S. Williams 2356 1905-2-12

GH: 00062025 Cleistanthus sp. Philippines: Sax River, Province Zamboanga, Mindanao; 550... R. S. Williams 2356 1905-2-12

GH: 00062018 Cleistanthus sp. Philippines: Sax River, Zamboanga Province, Mindanao; 500... R. S. Williams 2187 1905-3-4

GH: 00062018 Cleistanthus venosus C. B. Robbins Philippines: Sax River, Zamboanga Province, Mindanao; 500... R. S. Williams 2187 1905-3-4

GH: 02508553 Phyllanthus sp. Philippines: Bataan Mt. Mariveles, Lamao Riv. R. S. Williams 521 1904-1-22

GH: 02508551 Phyllanthus sp. Philippines: Baguio: [no additional data] R. S. Williams 1081 1904-6-13

Pinaceae
GH: 00395933 Abies lasiocarpa (Hooker) Nuttall USA: Montana Columbia Falls R. S. Williams 1896-10-6

Piperaceae
GH: 01883124 Piper betle Linnaeus Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 511 1904-1-21

GH: 01883553 Piper viminale Opiz Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 370 1903-12-26

GH: 01883548 Piper viminale Opiz Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 227 1903-11-25

Plagiotheciaceae
FH: 00220143 Plagiothecium mollicaule R. S. Williams Bolivia: near Pelichuco R. S. Williams 2780 1902-4-30
Plantaginaceae
GH: 02002404 Penstemon attenuatus pseudoprocerus (Rydberg) Cronquist USA: Montana [data not captured] R. S. Williams 181 1890-6-29

GH: 02118459 Penstemon confertus Douglas ex Lindley USA: Montana [data not captured] R. S. Williams 1894-6-22

GH: 02121011 Penstemon lyallii (A. Gray) A. Gray USA: Montana [data not captured] R. S. Williams 1894-7-25

GH: 02121793 Penstemon procerus Douglas ex Graham USA: Montana [data not captured] R. S. Williams 1894-6-4

GH: 01801557 Penstemon wilcoxii Rydberg USA: Montana [data not captured] R. S. Williams 1894-6-4

Poaceae
GH: 02469148 Apluda mutica Linnaeus Philippines: Baguio: [no additional data] R. S. Williams 1190 1904-6-4

GH: 02473341 Aristida cumingiana Trinius & Ruprecht Philippines: Benguet Itogon. R. S. Williams 1965 1904-11-18

GH: 02469245 Capillipedium spicigerum S. T. Blake Philippines: Baguio: [no data available] R. S. Williams 1187 1904-6-13

GH: 02243455 Centotheca lappacea (Linnaeus) Desvaux Philippines: Zamboanga del Sur Sax River. R. S. Williams 2380 1905-2-8

GH: 02469420 Coix lacryma-jobi Linnaeus Philippines: Baguio: [no additional data] R. S. Williams 1203 1904-5-19

GH: 02469404 Coix lacryma-jobi Linnaeus Philippines: Davao del Sur Todaya, Mt. Apo. R. S. Williams 2620 1905-4-4

GH: 02472817 Cynodon dactylon (Linnaeus) Persoon Philippines: Baguio: [no additional data] R. S. Williams 1175 1904-5-25

GH: 02469480 Dichanthium sericeum A. Camus Philippines: Benguet Itogon. R. S. Williams 1966 1904-10-18

GH: 02469496 Dimeria ornithopoda Trinius Philippines: Baguio: [no additional data] R. S. Williams 1958 1904-11-25

GH: 02469640 Eulalia sp. Philippines: Baguio: [no additional data] R. S. Williams 1960 1904-11-7

GH: 02469639 Eulalia sp. Philippines: Bataan Mt. Mariveles. R. S. Williams 218 1903-11-25

GH: 02469825 Imperata koenigii (Retzius) Beauvais Philippines: Baguio: [no additional data] R. S. Williams 1185 1904-5-25

GH: 02471651 Isachne beneckei Hack. Philippines: Baguio: [no additional data] R. S. Williams 1193 1904-5-25

GH: 02471823 Oplismenus affinis Schultes Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 135 1903-11-8

GH: 02471850 Oplismenus compositus rariflorus (J. Presl) U. Scholz Philippines: Baguio: [no additional data] R. S. Williams 1962 1904-10-27

GH: 02472315 Paspalum orbiculare G. Forster Philippines: Baguio: [no additional data] R. S. Williams 1178 1904-5-25

GH: 02472314 Paspalum orbiculare G. Forster Philippines: Baguio: [no additional data] R. S. Williams 1177 1904-5-25

GH: 02470360 Saccharum spontaneum Linnaeus Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 222 1903-11-21

GH: 02470383 Schizachyrium brevifolium (Swartz) Nees ex Büse Philippines: Benguet Itogon. R. S. Williams 1964 1904-11-18

GH: 02470381 Schizachyrium brevifolium (Swartz) Nees ex Büse Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 141 1903-11-14

GH: 02244398 Schizostachyum acutiflorum Munro Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 384 1903-12-19

GH: 02472597 Setaria flavida (Retzius) Veldkamp Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 81 1903-11-6

GH: 02472625 Setaria parviflora (Poiret) Kerguélen Philippines: Davao del Sur Santa Cruz. R. S. Williams 2973 1905-7-1

GH: 02470483 Sorghum nitidum (Vahl) Persoon Philippines: Davao del Sur Santa Cruz. R. S. Williams 2972 1905-7-1

GH: 02472681 Thuarea involuta (G. Forster) R. Brown ex Smith Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 220 1903-11-20

GH: 02472731 Urochloa fusiformis (Reeder) Veldkamp Philippines: Benguet Kias Hill. R. S. Williams 1963 1904-9-10

GH: 02472743 Urochloa reptans (Linnaeus) Stapf Philippines: Laguna Los Banos: [no additional data] R. S. Williams 2030 1905-1-15

Podocarpaceae
GH: 02246424 Dacrycarpus imbricatus de Laubenfels Philippines: Benguet Mount Santo Tomas. R. S. Williams 1298 1904-10-12

GH: 02246421 Dacrycarpus imbricatus de Laubenfels Philippines: Benguet Mount Santo Tomas. R. S. Williams 1298 1904-10-12

GH: 02246805 Nageia wallichiana (C. Presl) Kuntze Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 753 1903-3-22

Polygonaceae
GH: 02360970 Polygonum minimum S. Watson USA: Montana [data not captured] R. S. Williams 1895-8-21

Polypodiaceae
GH: 02467413 Goniophlebium lepidopteris T. Moore Bolivia: La Paz Apolo R. S. Williams 1131 1902-2-27

GH: 02219241 Microsorum punctatum (Linnaeus) Copeland Philippines: Zamboanga Sibugay Sax River R. S. Williams 2269 1905-2-20

GH: 02402176 Pleopeltis stolzei A. R. Smith Bolivia: [data not captured] R. S. Williams 1053 1902-1-30

GH: 02467413 Polypodium apagolepis de la Sota Bolivia: La Paz Apolo R. S. Williams 1131 1902-2-27

Polyporaceae
FH: 00482453 Coriolopsis rigida (Berk. & Mont.) Murrill USA: [data not captured] R. S. Williams s.n. 1908

Porpidiaceae
FH: 00474252 Porpidia hydrophila (Fries) H. Hertel & A. J. Schwab USA: Alaska [data not captured] R. S. Williams 1898

FH: 00474495 Porpidia macrocarpa (de Candolle) H. Hertel & A. J. Schwab USA: Alaska [data not captured] R. S. Williams

Pottiaceae
FH: 00625972 Bryobrittonia pellucida R. S. Williams Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-6

FH: 00213192 Hyophila nymaniana (M. Fleischer) M. Menzel Philippines: Bataan Central Luzon Island, Lamas River R. S. Williams 819 1903-11
FH: 00213191 Hyophila nymaniana (M. Fleischer) M. Menzel Philippines: Bataan Central Luzon Island, Lamas River R. S. Williams 819 1903-11
FH: 00213192 Hyophila rosea R. S. Williams Philippines: Bataan Central Luzon Island, Lamas River R. S. Williams 819 1903-11
FH: 00213191 Hyophila rosea R. S. Williams Philippines: Bataan Central Luzon Island, Lamas River R. S. Williams 819 1903-11
FH: 00845351 Merceya latifolia Kindberg USA: Montana [data not captured] R. S. Williams 1899-10-6

Proteaceae
GH: 02258513 Helicia robusta (Roxburgh) R. Brown ex Wallich Philippines: Bataan Upper Lamao River, Mt. Mariveles R. S. Williams 617 1904-2-23

Psoraceae
FH: 00475187 Psora russellii (Tuckerman) A. Schneider USA: Montana [data not captured] R. S. Williams 1893-4

FH: 00475188 Psora russellii (Tuckerman) A. Schneider USA: Montana [data not captured] R. S. Williams 1893-4

Pteridaceae
GH: 02528465 Pteris melanocaulon Fée Philippines: Zamboanga: Sax River R. S. Williams 2223 1905-2-6

GH: 02528488 Pteris parviloba Christ Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 206 1903-12-7

GH: 02528569 Pteris sp. Philippines: Davao Santa Cruz R. S. Williams 2828 1905-5-5

GH: 02528568 Pteris sp. Philippines: Zamboanga: Sax River R. S. Williams 2297 1905-3-7

Pterobryaceae
FH: 00060964 Garovaglia luzonensis R. S. Williams Philippines: Benguet Northern Luzon, Baguio, 1570 m, on tree fern... R. S. Williams 1878 1904-9
FH: 00060968 Garovaglia plicata punctidens (R. S. Williams) During Philippines: Benguet Northern Luzon Island, Baguio, on trunks of ... R. S. Williams 3151 1904-11
FH: 00060974 Garovaglia plicata punctidens (R. S. Williams) During Philippines: Benguet Luzon Island, Baguio, on tree trunks. R. S. Williams 3151 1904-11
FH: 00060968 Garovaglia punctidens R. S. Williams Philippines: Benguet Northern Luzon Island, Baguio, on trunks of ... R. S. Williams 3151 1904-11
FH: 00060974 Garovaglia punctidens R. S. Williams Philippines: Benguet Luzon Island, Baguio, on tree trunks. R. S. Williams 3151 1904-11
FH: 00213789 Jaegerinopsis luzonensis R. S. Williams Philippines: Bataan Luzon Island, Upper Lamas River, on trunks o... R. S. Williams 835 1904-3
Ramalinaceae
FH: 00302510 Biatora franciscana Tuckerman USA: Alaska Lake Lindeman R. S. Williams 1898-5-9
FH: 01139728 Platysma hepatizon (Acharius) Vainio Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01139721 Platysma juniperinum (Linnaeus) Frege Canada: Yukon Territory [data not captured] R. S. Williams 1899-4-23
FH: 01139739 Platysma juniperinum pinastri (Scopoli) Nylander Canada: Yukon Territory [data not captured] R. S. Williams 1898-10-2
FH: 01139716 Platysma juniperinum (Linnaeus) Frege USA: Montana [data not captured] R. S. Williams 1893-4
Ranunculaceae
GH: 00038410 Ranunculus yukonensis Britton Canada: Yukon Territory Near mouth of Bonanza River R. S. Williams 1899-6-18

GH: 00038634 Thalictrum philippinense C. B. Robinson Philippines: Benguet Baguio, Northern Luzon Island R. S. Williams 1137 1904-6-22

Rhamnaceae
GH: 01790144 Ceanothus sanguineus Pursh USA: Montana Columbia Falls R. S. Williams 1894-6-5

Rhizophoraceae
GH: 02264747 Carallia brachiata (Loureiro) Merrill Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 723 1904-3-7

Rhytidiaceae
FH: 00060607 Gollania philippinensis (Brotherus) Noguchi Philippines: Benguet Northern Luzon Island, Baguio, R. S. Williams 1728 1904-9
Roellobryaceae
FH: 00995243 Roellobryon roellii (Brotherus) Ochyra USA: Montana Along the Great Northern Railway, near Essex R. S. Williams 1896-8-17
FH: 00995244 Roellobryon roellii (Brotherus) Ochyra USA: Montana Along the Great Northern Railway, near Essex R. S. Williams 1896-8-17
Rosaceae
GH: 00026066 Alchemilla williamsii L. M. Perry Bolivia: Tolapampa, 10000 feet R. S. Williams 841 1901-9-11

GH: 00032477 Pygeum glandulosum Merrill Philippines: Bataan Lamao River, Mount Mariveles, Central Luzon ... R. S. Williams 642 1904-3-3

Rubiaceae
GH: 02604019 Scleromitrion capitatum Miq. Philippines: Bataan Mt. Mariveles R. S. Williams 200 1903-11-23

Saxifragaceae
GH: 01733389 Boykinia jamesii (Torrey) Engler USA: Montana near Belt River Cañon R. S. Williams 1885-6-21

GH: 00046961 Heuchera williamsii D. C. Eaton USA: Montana Lower Belt Park R. S. Williams 179 1889-6-30

GH: 01153689 Lithophragma glabrum Nuttall USA: Montana Columbia Falls R. S. Williams 1893-5-11

Scapaniaceae
FH: 00497447 Diplophyllum imbricatum (M. Howe) Müller Freib. ex Stephani Canada: Yukon Territory [data not captured] R. S. Williams 1898-5-24

Schizaeaceae
GH: 02283730 Lygodium auriculatum (Willdenow) Alston ex Alston & Holttum Philippines: Bataan Lamao Riv., Mt. Mariveles, "Tagalog Mts" R. S. Williams 210 1903-11-22

GH: 02283804 Lygodium circinnatum (Burman) Swartz Philippines: Davao Santa Cruz R. S. Williams 2820 1905-4-27

GH: 02283874 Lygodium flexuosum (Linnaeus) Swartz Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 66 1903-11-2

Seligeriaceae
FH: 00787337 Blindia acuta (Hedwig) Bruch & Schimper Canada: Yukon Territory [no additional data] R. S. Williams

Sematophyllaceae
FH: 01142497 Acroporium altopungens (Müller Halle) Brotherus Philippines: Bataan [data not captured] R. S. Williams 1904-1
FH: 01142503 Acroporium brevipes (Brotherus) Brotherus Philippines: Benguet Boguis, Benguet Prov., Luzon R. S. Williams 1904-9
FH: 01142511 Acroporium diminutum (Bridel) M. Fleischer Philippines: Luzon: [data not captured] R. S. Williams 1904-1
FH: 01142515 Acroporium falcifolium (M. Fleischer) M. Fleischer Philippines: Luzon: [data not captured] R. S. Williams 1904-1
FH: 01142497 Acroporium strepsiphyllum (Montagne) B. C. Tan Philippines: Bataan [data not captured] R. S. Williams 1904-1
FH: 01142515 Acroporium strepsiphyllum (Montagne) B. C. Tan Philippines: Luzon: [data not captured] R. S. Williams 1904-1
FH: 00965850 Meiothecium attenuatum Brotherus Philippines: Benguet [data not captured] R. S. Williams 1743 1904-9
FH: 00965912 Sematophyllum caespitosum Mitten Philippines: Benguet [data not captured] R. S. Williams 1732 1904-9
FH: 00965936 Sematophyllum luzonense Brotherus Philippines: Benguet [data not captured] R. S. Williams 1732 1904-9
FH: 00965940 Sematophyllum sp. Philippines: Benguet [data not captured] R. S. Williams 1725 1904-11
FH: 00220413 Sematophyllum tenuicarpum R. S. Williams Bolivia: Tumupasa R. S. Williams 2066 1902-1-3
FH: 01091125 Sematophyllum tenuicarpum R. S. Williams Bolivia: Tumupasa R. S. Williams 2066 1901-12-11
FH: 00220783 Trichosteleum petrophilum R. S. Williams Philippines: Luzon: Lamao river R. S. Williams 865 1903-12
Simaroubaceae
GH: 02252110 Brucea mollis Wallich ex Kurz Philippines: Bataan Lamao River, Mt. Mariveles. R. S. Williams 500 1904-1-18

GH: 02252278 Harrisonia perforata (Blanco) Merrill Philippines: Davao del Sur Padada. R. S. Williams 2963 1905-6-29

Smilacaceae
GH: 02325764 Smilax china Linnaeus Philippines: Benguet Mount Santo R. S. Williams 2008 1904-11-29

GH: 02325759 Smilax verruculosa Merrill Philippines: Benguet Baguio R. S. Williams 1046 1904-5-25

Solanaceae
GH: 00230164 Solanum nigrum Linnaeus Philippines: Baguio: R. S. Williams 1079 1904-6-4
GH: 00230203 Solanum sp. Philippines: Baguio: R. S. Williams 1149 1904-6-4
Sphaerophoraceae
FH: 01139795 Sphaerophorus fragilis (Linnaeus) Persoon Canada: Yukon Territory [data not captured] R. S. Williams 1898-5-5
FH: 01139805 Sphaerophorus globiferus (Linnaeus) de Candolle Canada: Yukon Territory [data not captured] R. S. Williams 1898-3
FH: 01139806 Sphaerophorus globiferus (Linnaeus) de Candolle Canada: Yukon Territory [data not captured] R. S. Williams 1898-5-20
Stereocaulaceae
FH: 01140342 Stereocaulon paschale (Linnaeus) Hoffmann Canada: Yukon Territory [data not captured] R. S. Williams 1898-5
FH: 01140355 Stereocaulon tomentosum Th. Fries Canada: Yukon Territory [data not captured] R. S. Williams 1898-10
FH: 01140356 Stereocaulon tomentosum simplex Riddle Canada: Yukon Territory [data not captured] R. S. Williams 1899-5-24
Symplocaceae
A: 02602580 Symplocos lancifolia Siebold & Zuccarini Philippines: [no additional data] R. S. Williams 2541 1903

A: 02602567 Symplocos lancifolia Siebold & Zuccarini Philippines: Benguet Baguio R. S. Williams 961 1904-9-21

A: 02602711 Symplocos pendula hirtistylis (C. B. Clarke) Nooteboom Philippines: Bataan Mt. Mariveles R. S. Williams 733 1904-3-22

GH: 02602731 Symplocos polyandra (Blanco) Brand Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 693 1904-3-10

Theaceae
GH: 02524137 Adinandra sp. Philippines: Baguio: [no additional data] R. S. Williams 1115 1904-6-29

GH: 02022737 Camellia lanceolata (Blume) Seemann Philippines: Baguio: [no additional data] R. S. Williams 1037 1904-10-16

GH: 02022736 Camellia lanceolata (Blume) Seemann Philippines: Baguio: [no additional data] R. S. Williams 1016 1904-10-26

GH: 02022754 Camellia montana Hung T. Chang & S. X. Ren Philippines: Bataan Upper Lamao River, Mt. Mariveles, Prov. Bata... R. S. Williams 618 1904-2-23

GH: 02456045 Eurya acuminata de Candolle Philippines: Baguio: [No additional data] R. S. Williams 934 1904-6-15

GH: 02294037 Gordonia luzonica Vidal Philippines: Bataan Upper Lamao River, Mt. Mariveles, Prov. Bata... R. S. Williams 747 1904-3-22

A: 00306655 Taonabo subserrata Rusby Bolivia: Cargadira R. S. Williams 1533 1902-7-30

A: 00306623 Ternstroemia polyandra Kobuski Bolivia: Santa Barbara R. S. Williams 1565 1902-8-30

A: 00306655 Ternstroemia subserrata (Rusby) Melchior Bolivia: Cargadira R. S. Williams 1533 1902-7-30

GH: 02520379 Ternstroemia toquian Fernandez-Villar Philippines: Bataan Upper Lamao River, Mt. Mariveles R. S. Williams 403 1903-1-3

Theliaceae
FH: 00846566 Myurella julacea (Schwägrichen) Schimper Canada: Yukon Territory [no additional data] R. S. Williams

FH: 00846484 Myurella tenerrima (Bridel) Lindberg Canada: Yukon Territory [no additional data] R. S. Williams

Thelypteridaceae
GH: 02404797 Macrothelypteris polypodioides (Hooker) Holttum Philippines: Bataan Lamao Riv., Mt. Mariveles R. S. Williams 558 1904-1-20

GH: 02403275 Pronephrium asperum (C. Presl) Holttum Philippines: Bataan Lamao Riv.; Mt. Mariveles R. S. Williams 215 1903-11-27

GH: 02403901 Pronephrium rhombeum (Christ) Holttum Philippines: Bataan Lamao Riv., Mt Mariveles R. S. Williams 208 1903-11-22

Thuidiaceae
FH: 00220684 Thuidium kiasense R. S. Williams Philippines: Luzon: Kias Hill, Benguet road, northern Luz... R. S. Williams 1834 1904-9
FH: 00220686 Thuidium kiasense R. S. Williams Philippines: Luzon: Kias Hill, Beuguet Road R. S. Williams 1834 1904-9
Umbilicariaceae
FH: 01141558 Gyrophora angulata (Tuckerman) Herre Canada: Yukon Territory [data not captured] R. S. Williams 1898-5-15
FH: 01141586 Gyrophora erosa (Weber) Acharius USA: Montana [data not captured] R. S. Williams 1893-4
FH: 01140370 Gyrophora hyperborea (Acharius) Acharius Canada: Yukon Territory [data not captured] R. S. Williams 1898-5-8
FH: 01140410 Gyrophora vellea (Linnaeus) Acharius USA: Montana [data not captured] R. S. Williams 1893-4
Usneaceae
FH: 00888382 Ramalina dilacerata (Hoffmann) Hoffmann Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 1889-3
FH: 00888330 Ramalina pollinaria (Westring) Acharius Canada: Yukon Territory Dawson (Yukon Territory): [no additional dat... R. S. Williams 1899-4
Verbenaceae
GH: 02328579 Callicarpa arborea Roxburgh Philippines: Benguet Baguio R. S. Williams 1003 1904-10-20

GH: 02328648 Callicarpa caudata Maximowicz Philippines: Zamboanga: Sax River R. S. Williams 2307 1905-2-25

GH: 02328665 Callicarpa erioclona J. C. Schauer Philippines: Davao Santa Cruz R. S. Williams 2964 1905-6-19

GH: 02328736 Callicarpa micrantha Vidal Philippines: Bataan Mt. Mariveles R. S. Williams 340 1903-12-15

A: 02324029 Clerodendrum philippinum Schauer Philippines: Sulu Jolo R. S. Williams 3120 1905

GH: 02018077 Clerodendrum sp. Philippines: Mindanao: [data not captured] R. S. Williams 2135 1905-2-12

A: 02018079 Clerodendrum sp. Philippines: [data not captured] R. S. Williams 2923 1905

GH: 02518809 Premna serratifolia Linnaeus Philippines: Benguet Baguio R. S. Williams 1086 1904-6-10

GH: 02518787 Premna serratifolia Linnaeus Philippines: Davao Santa Cruz R. S. Williams 2791 1905-5-10

GH: 02517038 Symphorema luzonicum (Villar) Villar Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 707 1904-3-13

GH: 02517067 Tectona grandis Linnaeus f. Philippines: Sulu Jolo R. S. Williams 3123 1905-7-27

GH: 02525049 Vitex negundo Linnaeus Philippines: Davao Padada R. S. Williams 2978 1905-6-28

GH: 02525042 Vitex negundo Linnaeus Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 185 1903-11-20

GH: 02525098 Vitex parviflora Jussieu Philippines: Davao del Sur Santa Cruz: [no additional data] R. S. Williams 2949 1905-6-16

GH: 02525097 Vitex parviflora Jussieu Philippines: Davao del Sur Santa Cruz: [no additional data] R. S. Williams 2949 1905-6-16

Vitaceae
GH: 02329722 Ampelopsis glandulosa brevipedunculata (Maximowicz) Momiyama Philippines: Benguet Loakan R. S. Williams 1034 1904-10-18

A: 02327063 Cayratia japonica (Thunberg) Gagnepain Philippines: Zamboanga Sibugay Sax River R. S. Williams 2345 1905-2-10

GH: 02327850 Cissus adnata Roxburgh Philippines: Zamboanga: Sax River R. S. Williams 2085 1905-2-2

GH: 02327838 Cissus adnata Roxburgh Philippines: Baguio: [no additional data] R. S. Williams 1052 1904-6-6

GH: 02327880 Cissus repens Lamarck Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 193 1903-11-12

GH: 02327867 Cissus rostrata Korthals ex Planchon Philippines: Bataan Lamao River, Mt. Mariveles, Prov. Bataan, Ce... R. S. Williams 586 1904-1-15

GH: 02326577 Leea aculeata Blume Philippines: Zamboanga Sibugay Sax River R. S. Williams 2162 1905-2-13

GH: 02326569 Leea aculeata Blume Philippines: Zamboanga Sibugay Sax River. R. S. Williams 2102 1905-2-3

GH: 02326746 Leea philippinensis Merrill Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 28 1903-11-24

A: 02326763 Leea philippinensis Merrill Philippines: [no additional data] R. S. Williams 3022

GH: 02325275 Tetrastigma loheri Gagnepain Philippines: Benguet Antamok R. S. Williams 1025 1904-10-22

GH: 02325291 Tetrastigma loheri Gagnepain Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 972 1904-1-22

Vittariaceae
GH: 00099026 Vittaria latifolia Benedict Bolivia: Santa Bárbara, 5500 feet R. S. Williams 1337 1902-8-30

Zingiberaceae
GH: 02421595 Costus speciosus (J.Koenig) Sm. Philippines: Bataan Lamao River, Mt. Mariveles R. S. Williams 312 1903-11-30

GH: 02532454 Etlingera elatior (Jack) R. M. Smith Philippines: Davao Santa Cruz R. S. Williams 2943 1905-6-2