Annonaceae GH: 00039645 Rollinia broadwayi cuneata R. E. Fries Guyana: Rockstone H. A. Gleason 576 1921-8
GH: 00039645 Rollinia exsucca (de Candolle ex Dunal) A. de Candolle Guyana: Rockstone H. A. Gleason 576 1921-8
Apocynaceae GH: 02116135 Himatanthus bracteatus (A. de Candolle) Woodson Guyana: Plants of British Guiana; East of Rockstone H. A. Gleason 777 1921-7-22
GH: 02378424 Lacmellea aculeata (Ducke) Monachino Guyana: Plants of British Guiana; Rockstone H. A. Gleason 910 1921-7-15
GH: 02379619 Mandevilla scabra (Hoffmannsegg ex Roemer & Schultes) K. Schumann Guyana: East of Rockstone; British Guiana H. A. Gleason 774 1921-7-22
GH: 02380493 Mesechites trifidus Müller Arg. Guyana: Bank of the Essequibo River, Rockstone H. A. Gleason 885 1921-7-31
GH: 02381291 Odontadenia geminata (Hoffmannsegg ex Roemer & Schultes) Müller Arg. Guyana: Potaro-Siparuni Bank of the Potaro River, Tumatumari H. A. Gleason 414 1921-7-4
GH: 02381289 Odontadenia geminata (Hoffmannsegg ex Roemer & Schultes) Müller Arg. Guyana: Potaro-Siparuni Bank of the Potaro River, Tumatumari H. A. Gleason 403 1921-7-4
GH: 02382960 Prestonia marginata Markgraf Guyana: Potaro-Siparuni Bank of the Potaro River, Tumatumari; Plants... H. A. Gleason 336 1921-7-4
GH: 02383065 Prestonia sp. Guyana: Bank of the Essequibo River, Rockstone; Plan... H. A. Gleason 886 1921-7-31
GH: 02375646 Tabernaemontana Linnaeus Guyana: Tumatumari H. A. Gleason 160 1921-6-18
GH: 02375645 Tabernaemontana cerea (Woodson) Leeuwenberg Guyana: Tumatumari H. A. Gleason 285 1921-6-18
GH: 02375646 Tabernaemontana cerea (Woodson) Leeuwenberg Guyana: Tumatumari H. A. Gleason 160 1921-6-18
GH: 02372069 Tabernaemontana undulata Vahl Guyana: Tumatumari H. A. Gleason 387 1921-6-18
GH: 02372071 Tabernaemontana undulata Vahl Guyana: Rockstone H. A. Gleason 591 1921-7-15
Araceae GH: 01635669 Anthurium jenmanii Engler Guyana: Rockstone H. A. Gleason 617 1921-7-15
GH: 01629142 Philodendron callosum K. Krause Guyana: Bank of the Potaro River, Tumatumari H. A. Gleason 364 1921-7-4
GH: 01629175 Philodendron fragrantissimum (Hooker) G. Don Guyana: Tumatumari H. A. Gleason 121 1921-6-18
GH: 01629183 Philodendron fragrantissimum (Hooker) G. Don Guyana: Rockstone H. A. Gleason 560 1921-7-15
GH: 01629270 Philodendron pedatum (Hooker) Kunth Guyana: Tumatumari H. A. Gleason 145 1921-6-18
GH: 01874391 Urospatha sp. Guyana: Tumatumari H. A. Gleason 109 1921-6-18
Asteraceae GH: 00010318 Mikania gleasonii B. L. Robinson Guyana: Rockstone H. A. Gleason 681 1921-7-15
Bromeliaceae GH: 02016286 Aechmea mertensii Schultes & Schultes f. Guyana: along Potaro River, Tumatumari H. A. Gleason 73 1921-7-8
Elaeocarpaceae GH: 00046162 Lecostomon sylvestre Gleason Guyana: Kangaruma-Potaro Landing H. A. Gleason 211 1921-6-25
Euphorbiaceae GH: 00047384 Croton potaroensis Lanjouw Guyana: Bank of the Potaro River, Tumatumari H. A. Gleason 329 1921-7-4
Lentibulariaceae GH: 01976614 Utricularia Guyana: East of Rockstone. British Guiana. H. A. Gleason 783 1921-7-22
GH: 01976459 Utricularia calycifida Benjamin Guyana: East of Rockstone. H. A. Gleason 739 1921-7-22
GH: 01976614 Utricularia triloba Benjamin Guyana: East of Rockstone. British Guiana. H. A. Gleason 783 1921-7-22
Lindsaeaceae GH: 02269162 Lindsaea guianensis (Aublet) Dryander Guyana: H. A. Gleason 229 1921-6-25
Lissocarpaceae GH: 00061189 Lissocarpa guianensis Gleason Guyana: Butukari, dense upland forest H. A. Gleason 724 1921
Malpighiaceae GH: 00254131 Hiraea Jacquin Guyana: Bank of the Potaro River, Tumatumari H. A. Gleason 396 1921-7-4
Melastomataceae GH: 00072356 Leandra purpurea Gleason Guyana: Tumatumari, dense upland forest H. A. Gleason 89 1921-7-8
GH: 00072861 Miconia plumosa Gleason Guyana: Dry sandhills, east of Rockstone H. A. Gleason 901 1921-7-22
Meliaceae GH: 00044857 Guarea concinna Sandwith Guyana: Tumatumari H. A. Gleason 443 1921-7
GH: 00044857 Guarea pubescens pubescens Guyana: Tumatumari H. A. Gleason 443 1921-7
Menispermaceae GH: 00038836 Abuta bullata Moldenke Guyana: Bank of the Potaro River, Tumatumari H. A. Gleason 358 1921-7-4
Moraceae GH: 00312453 Ficus maxima Miller Guyana: Bank of the Essequibo River, Rockstone H. A. Gleason 900 1921-7-31
Musaceae GH: 00030598 Bihai sylvestris Gleason Guyana: Dense upland forest, Tumatumari H. A. Gleason 105 1921-7
GH: 00030598 Heliconia psittacorum Linnaeus f. Guyana: Dense upland forest, Tumatumari H. A. Gleason 105 1921-7
Myrsinaceae GH: 00518552 Conomorpha sp. Guyana: Tumatumari H. A. Gleason 159 1921-7-18
GH: 00518552 Cybianthus brownii Gleason Guyana: Tumatumari H. A. Gleason 159 1921-7-18
GH: 00139910 Cybianthus grandifolius (Mez) G. Agostini Guyana: Kangaruma - Potaro Landing H. A. Gleason 271 1921-6-25
GH: 00518552 Cybianthus venezuelanus Mez Guyana: Tumatumari H. A. Gleason 159 1921-7-18
GH: 00139910 Weigeltia sylvatica Gleason Guyana: Kangaruma - Potaro Landing H. A. Gleason 271 1921-6-25
Myrtaceae GH: 00069917 Marlierea gleasonii McVaugh Guyana: Tumatumari, dense upland forest H. A. Gleason 171 1921-7
Orchidaceae GH: 02154446 Brassavola martiana Lindley Guyana: Bank of the Potaro River, Tumatumari H. A. Gleason 316 1921-7-4
GH: 02288624 Cyrtopodium andersonii (Lambert ex Andrews) R. Brown Guyana: East of Rockstone H. A. Gleason 740 1921-7-20
GH: 02288625 Cyrtopodium andersonii (Lambert ex Andrews) R. Brown Guyana: East of Rockstone H. A. Gleason 806 1921-7-22
GH: 02288628 Cyrtopodium andersonii (Lambert ex Andrews) R. Brown Guyana: East of Rockstone H. A. Gleason 740 1921-7-22
AMES: 02288676 Cyrtopodium andersonii (Lambert ex Andrews) R. Brown Guyana: East of Rockstone H. A. Gleason 740 1921-7-22
GH: 02288678 Cyrtopodium andersonii (Lambert ex Andrews) R. Brown Guyana: East of Rockstone H. A. Gleason 740 1921-7-22
AMES: 02288693 Cyrtopodium andersonii (Lambert ex Andrews) R. Brown Guyana: East of Rockstone H. A. Gleason 806 1921-7-22
GH: 01946233 Habenaria rodeiensis Barbosa Rodrigues Guyana: Dry Sandhills, East of Rockstone. H. A. Gleason 781 1921-7-22
GH: 02124623 Prosthechea roraimensis V. P. Castro & M. A. Campacci Guyana: Tumatumari H. A. Gleason 305 1921-6-18
AMES: 02124617 Prosthechea roraimensis V. P. Castro & M. A. Campacci Guyana: Tumatumari H. A. Gleason 305 1921-6-18
GH: 02124623 Prosthechea vespa (Vellozo) W. E. Higgins Guyana: Tumatumari H. A. Gleason 305 1921-6-18
AMES: 02124617 Prosthechea vespa (Vellozo) W. E. Higgins Guyana: Tumatumari H. A. Gleason 305 1921-6-18
AMES: 02158545 Vanilla wrightii H. G. Reichenbach Guyana: Lowland Forest, Rockstone H. A. Gleason 526 1921-7-13
Passifloraceae GH: 00068035 Passiflora capparidifolia Killip Guyana: Bank of the Potero River, Tumatumari H. A. Gleason 328 1921-7-4
Piperaceae GH: 01983209 Lepianthes peltata (Linnaeus) Rafinesque ex R. A. Howard Guyana: Indian clearing, Kangaruma H. A. Gleason 196 1921-6-25
GH: 01982352 Peperomia macrostachyos (Vahl) A. Dietrich Guyana: East of Rockstone H. A. Gleason 810 1921-7-22
GH: 01964313 Piper aduncum Linnaeus Guyana: along Potaro River, Tumatumari H. A. Gleason 74 1921-6-18
GH: 01964314 Piper aduncum Linnaeus Guyana: Indian Clearing, Kangaruma H. A. Gleason 192 1921-6-25
GH: 01964589 Piper arboreum Aublet Guyana: Tumatumari H. A. Gleason 300 1921-6-18
GH: 01933051 Piper cyrtopodon C. de Candolle Guyana: Tumatumari H. A. Gleason 299 1921-6-18
GH: 01933079 Piper demeraranum (Miquel) C. de Candolle Guyana: Rockstone H. A. Gleason 579 1921-7-15
GH: 00005719 Piper gleasonii Yuncker Guyana: Rockstone H. A. Gleason 857 1921-8
GH: 01933498 Piper hostmannianum (Miquel) C. de Candolle Guyana: Rockstone H. A. Gleason 529 1921-7-13
GH: 01933497 Piper hostmannianum (Miquel) C. de Candolle Guyana: along Potaro River, Tumatumari H. A. Gleason 75 1921-6-18
GH: 01933463 Piper hostmannianum (Miquel) C. de Candolle Guyana: Butukari H. A. Gleason 707 1921-7-20
GH: 01933461 Piper hostmannianum (Miquel) C. de Candolle Guyana: Rockstone H. A. Gleason 662 1921-7-15
GH: 01933473 Piper hostmannianum ramiflorum C. de Candolle Guyana: East of Rockstone H. A. Gleason 766 1921-7-22
GH: 00005836 Piper rupununianum Trelease & Yuncker Guyana: Tumatumari H. A. Gleason 107 1921-7
GH: 00005868 Piper submelanostictum amelanostictum Yuncker Guyana: Rockstone H. A. Gleason 566 1921-8
Rapateaceae GH: 00028979 Windsorina guianensis Gleason Guyana: Dense upland bush, Kangaruma-Potaro Landing H. A. Gleason 272 1921-6-25
Rubiaceae GH: 00112540 Patima guianensis Aublet Guyana: Mazaruni-Potaro Kangaruma-Potaro Landing, dense upland bush H. A. Gleason 237 1921-6-25
Rutaceae GH: 00518552 Esenbeckia sp. Guyana: Tumatumari H. A. Gleason 159 1921-7-18
Sapindaceae GH: 00098207 Paullinia arenicola Gleason Guyana: Dry sandy hills east of Rockstone H. A. Gleason 803 1921-7-22
Theaceae GH: 00306608 Ternstroemia Guyana: Potaro Landing H. A. Gleason 258 1921-6-27
GH: 00306608 Ternstroemia gleasoniana Kobuski Guyana: Potaro Landing H. A. Gleason 258 1921-6-27
Verbenaceae GH: 00112540 Aegiphila gleasonii Moldenke Guyana: Mazaruni-Potaro Kangaruma-Potaro Landing, dense upland bush H. A. Gleason 237 1921-6-25
Zingiberaceae GH: 00030692 Renealmia floribunda K. Schumann Guyana: Dense upland forest, Tumatumari H. A. Gleason 138 1921-7
GH: 00030692 Renealmia pedicellaris Gleason Guyana: Dense upland forest, Tumatumari H. A. Gleason 138 1921-7
