Aceraceae GH: 01791722 Acer negundo Linnaeus USA: Maryland Town of Preston, at the end of the railroad ... W. D. Longbottom 11,546 2008-6-1
GH: 01791723 Acer negundo Linnaeus USA: Maryland At the end of Criss Ford Road at the Monocac... W. D. Longbottom [data not capture... 11,795 2008-7-27
GH: 01791725 Acer negundo Linnaeus USA: Maryland Marley Creek Swamp, along Marley Creek betwe... W. D. Longbottom 3853 1994-5-13
GH: 01791726 Acer negundo Linnaeus USA: Maryland Billingsly Point Area at the end of Green La... W. D. Longbottom [data not capture... 3074 1992-6-8
GH: 01794305 Acer saccharum Marshall USA: Maryland Brock Bridge Road Area of Patuxent River Par... W. D. Longbottom 3777 1994-4-26
Amaranthaceae GH: 01929981 Froelichia floridana (Nuttall) Moquin-Tandon USA: Delaware East of the town of Georgetown, along US Rt.... W. D. Longbottom 12,125 2008-9-1
Anacardiaceae GH: 01869471 Toxicodendron vernix (Linnaeus) Kuntze USA: Maryland [no additional data] W. D. Longbottom 3152 1992-6-17
Asclepiadaceae GH: 00993384 Asclepias incarnata pulchra (Ehrhart ex Willdenow) Woodson USA: Maryland Town of Cambridge, along MD Rt. 16 near Wood... W. D. Longbottom 11,872 2008-8-8
GH: 01046691 Asclepias viridiflora Rafinesque USA: Maryland Soldier's Delight National Environmental Are... W. D. Longbottom 3215 1992-7-9
Asteraceae GH: 01924483 Ageratina altissima (Linnaeus) R. M. King & H. Robinson USA: New Jersey Moorestown, I-295 and NJ Rt. 38 W. D. Longbottom 13000 2009-10-21
GH: 02172148 Arctium minus (Hill) Bernhardi USA: Virginia [data not captured] W. D. Longbottom 4718 1999-8-10
GH: 02216161 Chrysopsis mariana (Linnaeus) Elliott USA: Maryland [data not captured] W. D. Longbottom 4337 1997-9-18
GH: 02189338 Eupatorium hyssopifolium Linnaeus USA: Delaware South of the town of Georgetown & west of th... W. D. Longbottom 16,128 2011-9-21
GH: 02189374 Eupatorium hyssopifolium Linnaeus USA: Maryland Jug Bay Wetlands Sanctuary, Wrighton Road. W. D. Longbottom 4339 1997-9-18
GH: 02189372 Eupatorium hyssopifolium Linnaeus USA: Maryland Town of West Ocean City, along Golf Course R... W. D. Longbottom 12,158 2008-9-6
GH: 02190669 Eupatorium serotinum Michaux USA: New Jersey Barclay Farm, along NJ Rt. 70, Marlton Pike ... W. D. Longbottom 12377 2008-11-7
GH: 02191470 Eutrochium purpureum (Linnaeus) E. E. Lamont USA: Virginia near rest stop on east side of I-81, near th... W. D. Longbottom 4719 1999-8-10
GH: 01832871 Hieracium scabrum Michaux USA: Maryland [data not captured] W. D. Longbottom 4338 1997-9-18
GH: 00978906 Tussilago farfara Linnaeus USA: Maryland Brock Ridge Road at the Patuxent River W. D. Longbottom 3767 1994-4-4
Betulaceae GH: 02197328 Alnus serrulata (Aiton) Willdenow USA: Maryland Kelly Ponds Area of Patuxent River Park on P... W. D. Longbottom 3757 1994-3-23
GH: 02195920 Betula nigra Linnaeus USA: Maryland Governor's Bridge "Gravel Pits" just south o... W. D. Longbottom 3513 1993-5-14
Boraginaceae GH: 01957522 Buglossoides arvensis (Linnaeus) I. M. Johnston USA: Maryland East of the town of Easton, along Kingston R... W. D. Longbottom 5795 2005-5-9
GH: 01957527 Buglossoides arvensis (Linnaeus) I. M. Johnston USA: Maryland South of the towns of Hillsboro & Queen Anne... W. D. Longbottom 10,963 2008-4-20
GH: 01957528 Buglossoides arvensis (Linnaeus) I. M. Johnston USA: Maryland Town of Linkwood, at the jct. of US Rt. 50, ... W. D. Longbottom 12,472 2009-4-11
GH: 01957529 Buglossoides arvensis (Linnaeus) I. M. Johnston USA: Maryland Town of Ellicott City, along the ramp from n... W. D. Longbottom 11,348 2008-5-6
GH: 02059418 Mertensia virginica (Linnaeus) Persoon ex Link USA: Virginia Turkey Run Recreational Area, along the Poto... W. D. Longbottom [data not capture... 4726 2000-4-9
Brassicaceae GH: 01549343 Lepidium oblongum Small USA: Maryland Town of Queenstown, along US Rt. 50, Ocean G... W. D. Longbottom 12,518 2009-4-19
GH: 01693208 Rorippa sylvestris (Linnaeus) Besser USA: Maryland At the end of Criss Ford Road at the Monocac... W. D. Longbottom [data not capture... 11,787 2008-7-27
GH: 01731261 Thlaspi alliaceum Linnaeus USA: Delaware South of the town of Dover, Rt. One about 1/... W. D. Longbottom 12545 2009-4-22
GH: 01731266 Thlaspi alliaceum Linnaeus USA: Maryland Town of Linkwood, along Linkwood Road on the... W. D. Longbottom 12,505 2009-4-18
GH: 01731267 Thlaspi alliaceum Linnaeus USA: Maryland Town of Edgewood, along I-95, John F. Kenned... W. D. Longbottom 12,531 2009-4-20
GH: 01731268 Thlaspi alliaceum Linnaeus USA: Maryland Town of Burtonsville, at the junction of US ... W. D. Longbottom 12,488 2009-4-12
GH: 01731269 Thlaspi alliaceum Linnaeus USA: Maryland Brock Bridge Road at Dorsey Run Road W. D. Longbottom 12,474 2009-4-12
GH: 01731379 Thlaspi arvense Linnaeus USA: Maryland Town of Annapolis Junction, at the intersect... W. D. Longbottom 10,950 2008-4-19
GH: 01731380 Thlaspi arvense Linnaeus USA: Maryland Along US Rt. 50, at Bay Dale Drive W. D. Longbottom 13,252 2010-5-8
Caryophyllaceae GH: 01714412 Paronychia canadensis (Linnaeus) Alph. Wood USA: Maryland Jug Bay Wetlands Sanctuary. W. D. Longbottom 4311 1997-9-3
GH: 01715929 Saponaria officinalis Linnaeus USA: Maryland Town of Hurlock, along MD Rt. 307, Williamsb... W. D. Longbottom 11,737 2008-7-10
GH: 01751541 Silene antirrhina Linnaeus USA: Maryland Lake Waterford Run, west of the lake near MD... W. D. Longbottom 3834 1994-5-6
Celastraceae GH: 01854147 Celastrus orbiculatus Thunberg USA: New Jersey Ashland, between I-295 and the New Jersey Tu... W. D. Longbottom 12392 2008-11-26
Chenopodiaceae GH: 01826508 Atriplex prostrata Boucher ex de Candolle USA: Maryland [data not captured] W. D. Longbottom 4568 1998-9-24
Commelinaceae GH: 02113145 Commelina virginica Linnaeus USA: Maryland [data not captured] W. D. Longbottom 3745 1993-10-6
GH: 02113144 Commelina virginica Linnaeus USA: Maryland [data not captured] W. D. Longbottom [data not capture... 3755 1993-10-15
GH: 02113914 Gibasis pellucida (M. Martens & Galeotti) D. R. Hunt USA: Florida [data not captured] W. D. Longbottom [data not capture... 11,113 2008-4-29
GH: 02113317 Murdannia keisak (Hasskarl) Handel-Mazzetti USA: Maryland [data not captured] W. D. Longbottom [data not capture... 2718 1991-10-2
GH: 02113316 Murdannia keisak (Hasskarl) Handel-Mazzetti USA: Maryland [data not captured] W. D. Longbottom 3743 1993-10-6
GH: 02113314 Murdannia keisak (Hasskarl) Handel-Mazzetti USA: Maryland [data not captured] W. D. Longbottom 3743 1993-10-6
Convolvulaceae GH: 02042041 Ipomoea hederacea Jacquin USA: South Carolina Olanta Highway, US Rt. 301 at the Lynches Ri... W. D. Longbottom 4603 1998-10-2
GH: 02042351 Ipomoea pandurata Conzatti & L. C. Smith USA: Maryland Town of Crofton, growing around pond behind ... W. D. Longbottom [data not capture... 4523 1998-7-27
GH: 02042938 Jacquemontia tamnifolia (Linnaeus) Grisebach USA: South Carolina Olanta Highway, US Rt. 301 at the Lynches Ri... W. D. Longbottom [data not capture... 4604 1998-10-2
Cucurbitaceae GH: 01544603 Sicyos angulatus Linnaeus USA: Maryland Town of Crofton, Ruppert archery Area of Pat... W. D. Longbottom 4335 1997-9-11
GH: 01544604 Sicyos angulatus Linnaeus USA: Maryland Governor's Bridge Gravel Pits just south of ... W. D. Longbottom [data not capture... 3754 1993-10-15
Cyperaceae GH: 02391141 Carex atlantica L. H. Bailey USA: Maryland [data not captured] W. D. Longbottom 3009 1992-5-28
GH: 02391258 Carex atlantica capillacea (L. H. Bailey) Reznicek USA: Delaware [data not captured] W. D. Longbottom 17357 2012-5-24
GH: 01826742 Carex austrina Mackenzie USA: Delaware [data not captured] W. D. Longbottom 14892 2011-5-11
GH: 01773911 Carex bullata Schkuhr ex Willdenow USA: Maryland [data not captured] W. D. Longbottom 5908 2005-5-29
GH: 02393805 Carex canescens disjuncta (Fernald) Toivonen USA: Maryland [data not captured] W. D. Longbottom 3012 1992-5-28
GH: 00222870 Carex comosa Boott USA: Massachusetts Lee: At the intersection of Devon Road and W... W. D. Longbottom 3256 1992-7-19
GH: 02578166 Carex frankii Kunth USA: Maryland [data not captured] W. D. Longbottom 17637 2012-7-3
GH: 02578167 Carex frankii Kunth USA: Maryland [data not captured] W. D. Longbottom 17621 2012-6-28
GH: 02578168 Carex frankii Kunth USA: Maryland [data not captured] W. D. Longbottom 17643 2012-7-7
GH: 02578169 Carex frankii Kunth USA: Maryland [data not captured] W. D. Longbottom 17588 2012-6-26
GH: 02578173 Carex frankii Kunth USA: Maryland [data not captured] W. D. Longbottom 3890 1994-6-5
GH: 01826744 Carex gravida L. H. Bailey USA: Delaware [data not captured] W. D. Longbottom 14889 2011-5-11
GH: 01772725 Carex grayi Carey USA: Maryland [data not captured] W. D. Longbottom 3737 1993-9-2
GH: 01772726 Carex grayi Carey USA: Maryland [data not captured] W. D. Longbottom 4330 1997-9-6
GH: 01772573 Carex intumescens Rudge USA: Maryland [data not captured] W. D. Longbottom 5873 2005-5-26
GH: 01772125 Carex louisianica L. H. Bailey USA: Maryland [data not captured] W. D. Longbottom 5956 2005-6-1
GH: 01772130 Carex louisianica L. H. Bailey USA: Maryland [data not captured] W. D. Longbottom 17648 2012-7-7
GH: 01772131 Carex louisianica L. H. Bailey USA: Maryland [data not captured] W. D. Longbottom 3580 1993-6-1
GH: 01772187 Carex lupulina Muhlenberg ex Willdenow USA: Delaware [data not captured] W. D. Longbottom 17668 2012-7-11
GH: 01772188 Carex lupulina Muhlenberg ex Willdenow USA: Delaware [data not captured] W. D. Longbottom 17669 2012-7-11
GH: 01772258 Carex lupulina Muhlenberg ex Willdenow USA: Maryland [data not captured] W. D. Longbottom 3226 1992-7-14
GH: 01772260 Carex lupulina Muhlenberg ex Willdenow USA: Maryland [data not captured] W. D. Longbottom 11770 2008-7-23
GH: 01773119 Carex lurida Wahlenberg USA: Maryland [data not captured] W. D. Longbottom 3160 1992-6-23
GH: 01826747 Carex oklahomensis Mackenzie USA: Delaware [data not captured] W. D. Longbottom 25273 2016-6-11
GH: 02395767 Carex oklahomensis Mackenzie USA: Maryland [data not captured] W. D. Longbottom 6179 2005-6-26
GH: 02395766 Carex oklahomensis Mackenzie USA: Maryland [data not captured] W. D. Longbottom 12903 2009-6-3
GH: 02395764 Carex oklahomensis Mackenzie USA: Delaware [data not captured] W. D. Longbottom 13605 2010-6-12
GH: 02369927 Carex rosea Schkuhr ex Willdenow USA: Maryland [data not captured] W. D. Longbottom 3019 1992-5-28
GH: 02370965 Carex spicata Hudson USA: Maryland [data not captured] W. D. Longbottom 19394 2013-6-4
GH: 01775940 Carex typhina Michaux USA: Maryland [data not captured] W. D. Longbottom 3748 1993-10-6
GH: 01775941 Carex typhina Michaux USA: Maryland [data not captured] W. D. Longbottom 3741 1993-9-29
GH: 02395051 Carex vulpinoidea Michaux USA: Maryland [data not captured] W. D. Longbottom 3134 1992-6-16
GH: 01005285 Cyperus Linnaeus USA: Maryland Town of Preston, Railroad Avenue between Map... W. D. Longbottom 11714 2008-7-4
GH: 01005286 Cyperus Linnaeus USA: Florida Town of Sanford, along Oakway W. D. Longbottom 11044 2008-4-28
GH: 01005287 Cyperus Linnaeus USA: Maryland Town of Princess Anne, along US Rt. 13 at Du... W. D. Longbottom 6544 2005-8-28
GH: 01005287 Cyperus filicinus Vahl USA: Maryland Town of Princess Anne, along US Rt. 13 at Du... W. D. Longbottom 6544 2005-8-28
GH: 01005285 Cyperus lupulinus (Sprengel) Marcks USA: Maryland Town of Preston, Railroad Avenue between Map... W. D. Longbottom 11714 2008-7-4
GH: 01005286 Cyperus polystachyos Rottbøll USA: Florida Town of Sanford, along Oakway W. D. Longbottom 11044 2008-4-28
GH: 01930176 Froelichia gracilis (Hooker) Moquin-Tandon USA: Maryland Town of Salisbury, along Goddard Parkway and... W. D. Longbottom 11,861 2008-8-7
GH: 01930198 Froelichia gracilis (Hooker) Moquin-Tandon USA: New Jersey Town of Avalon, Avalon Blvd. 601 just west o... W. D. Longbottom 3992 1996-8-20
GH: 00894795 Scirpus atrocinctus Fernald USA: Massachusetts Lee: Lee W. D. Longbottom 3255 1992-7-19
GH: 00894795 Scirpus atrovirens Muhlenberg USA: Massachusetts Lee: Lee W. D. Longbottom 3255 1992-7-19
GH: 00894796 Scirpus atrovirens Muhlenberg USA: Massachusetts Lee: Lee W. D. Longbottom 3255 1992-7-19
GH: 01153922 Scirpus georgianus R. M. Harper USA: Maryland Near the town of Crownsville (Round Bay Bog)... W. D. Longbottom 3328 1992-8-20
Elaeagnaceae GH: 01576080 Elaeagnus angustifolia Linnaeus USA: Maryland South of the towns of Hillsboro & Queen Anne... W. D. Longbottom 10.965 2008-4-20
Fabaceae GH: 01935055 Amorpha fruticosa Linnaeus USA: Maryland Greenspring Avenue at the Jones Falls ca. on... W. D. Longbottom 3129 1992-6-15
GH: 01935825 Amphicarpaea bracteata (Linnaeus) Fernald USA: Maryland Town of Annapolis Junction, Little Patuxent ... W. D. Longbottom 4316 1997-9-6
GH: 02067065 Apios americana Medikus USA: Maryland Solleys Cove, Marley Creek near Carbide Road... W. D. Longbottom 3708 1993-8-11
GH: 01881603 Centrosema virginianum (Linnaeus) Bentham USA: Virginia Diascund Creek Reservoir at Rt. 620. W. D. Longbottom [data not capture... 4240 1997-7-27
GH: 02149247 Lathyrus latifolius Linnaeus USA: Maryland Town of Salisbury, South Tower Drive and Llo... W. D. Longbottom 11,402 2008-5-21
GH: 02177789 Lupinus perennis Linnaeus USA: Maryland [data not captured] W. D. Longbottom 5853 2005-5-22
GH: 02129847 Medicago minima Linnaeus & Desrousseaux USA: Maryland [data not captured] W. D. Longbottom 11403 2008-5-21
GH: 02129982 Medicago sativa Linnaeus USA: Maryland [data not captured] W. D. Longbottom 11771 2008-7-24
GH: 02129981 Medicago sativa Linnaeus USA: Maryland [data not captured] W. D. Longbottom 11749 2008-7-12
GH: 00571287 Robinia hispida Linnaeus USA: Maryland Along I-97 at Hawkins Road W. D. Longbottom 11357 2008-5-10
GH: 00571287 Robinia viscosa Ventenat USA: Maryland Along I-97 at Hawkins Road W. D. Longbottom 11357 2008-5-10
GH: 02135886 Sesbania herbacea (Miller) McVaugh USA: South Carolina [data not captured] W. D. Longbottom [data not capture... 4609 1998-10-3
GH: 02137301 Tephrosia spicata (Walter) Torrey & A. Gray USA: Maryland [data not captured] W. D. Longbottom 11755 2008-7-14
GH: 02137569 Tephrosia virginiana (Linnaeus) Persoon USA: Maryland [data not captured] W. D. Longbottom 6132 2005-6-12
GH: 02137608 Tephrosia virginiana (Linnaeus) Persoon USA: New Jersey [data not captured] W. D. Longbottom 3980 1996-6-21
GH: 02137995 Trifolium arvense Linnaeus USA: Maryland [data not captured] W. D. Longbottom 9118 2007-6-4
GH: 02347692 Wisteria floribunda de Candolle USA: Maryland [data not captured] W. D. Longbottom 10987 2008-4-25
Geraniaceae GH: 01864723 Geranium molle Linnaeus USA: Maryland Town of Fruitland, IRL Lane W. D. Longbottom 10,986 2008-4-25
Haloragaceae GH: 01628693 Proserpinaca palustris Linnaeus USA: Maryland Jonestown, MD Rt. 16, Harmony Road, at Klein... W. D. Longbottom 19,999 2013-7-10
Hydrangeaceae GH: 01750980 Hydrangea arborescens Linnaeus USA: Maryland At the end of Criss Ford Road at the Monocac... W. D. Longbottom [data not capture... 11,790 2008-7-27
Iridaceae GH: 01747564 Iris ochroleuca Linnaeus USA: Maryland Dover Bridge Marsh, MD Rt. 331 at the Chopta... W. D. Longbottom 5849 2005-5-22
Juncaceae GH: 02098271 Juncus acuminatus Michaux USA: Maryland [data not captured] W. D. Longbottom 10,147 2007-8-19
GH: 02400261 Juncus biflorus Elliott USA: Maryland [data not captured] W. D. Longbottom 11,680 2008-6-30
GH: 02101802 Juncus dichotomus Elliott USA: Delaware [data not captured] W. D. Longbottom 10,052 2007-8-14
GH: 02101940 Juncus diffusissimus Buckley USA: Maryland [data not captured] W. D. Longbottom 13,769 2010-7-8
GH: 02102794 Juncus effusus solutus (Fernald & Wiegand) Hämet-Ahti USA: Maryland [data not captured] W. D. Longbottom 3157 1992-6-17
GH: 02399993 Juncus repens Michaux USA: Delaware [data not captured] W. D. Longbottom 12,134 2008-9-1
Lamiaceae GH: 01553818 Lamium galeobdolon (Linnaeus) Linnaeus USA: Maryland Pasadena, Beachwood Park, Beachwood Park Roa... W. D. Longbottom 10,982 2008-4-22
GH: 01553857 Lamium purpureum Linnaeus USA: Maryland Town of Linkwood, at the jct. of US Rt. 50, ... W. D. Longbottom 12,469 2009-4-11
GH: 01598944 Prunella vulgaris Linnaeus USA: Maryland Along MD Rt. 404 just west of Bullock Road a... W. D. Longbottom [data not capture... 6269 2005-7-12
GH: 01597913 Pycnanthemum setosum Nuttall USA: Maryland Town of Denton, along MD Rt. 404, Shore High... W. D. Longbottom 11,824 2008-7-29
Limnanthaceae GH: 01181140 Floerkea proserpinacoides Willdenow USA: Maryland Governor's Bridge "Gravel Pits" Governor's B... W. D. Longbottom 3782 1994-4-27
Lycopodiaceae GH: 02164839 Dendrolycopodium obscurum (Linnaeus) A. Haines USA: New Jersey Town of Moorestown, along NJ Rt. 38, south o... W. D. Longbottom 12409 2009-1-12
GH: 02164822 Dendrolycopodium obscurum (Linnaeus) A. Haines USA: Maryland Hickman, along Greenwood Road, MD Rt. 16, at... W. D. Longbottom 12,415 2009-2-21
GH: 02164821 Dendrolycopodium obscurum (Linnaeus) A. Haines USA: Maryland North of Berlin, along east bound MD Rt. 90,... W. D. Longbottom 13,024 2010-3-8
GH: 02164820 Dendrolycopodium obscurum (Linnaeus) A. Haines USA: Maryland North west of Berlin, along MD Rt. 90, Ocean... W. D. Longbottom 12,412 2009-1-23
GH: 02164819 Dendrolycopodium obscurum (Linnaeus) A. Haines USA: Maryland Town of Vienna, along east bound US RT. 50, ... W. D. Longbottom 13,022 2010-2-27
GH: 02164811 Dendrolycopodium obscurum (Linnaeus) A. Haines USA: Delaware Town of Atlanta, along DE Rt. 18, Federalsbu... W. D. Longbottom 12,406 2008-12-27
GH: 02164810 Dendrolycopodium obscurum (Linnaeus) A. Haines USA: Delaware North of the town of Dover, along south boun... W. D. Longbottom 12,411 2009-1-21
GH: 02164809 Dendrolycopodium obscurum (Linnaeus) A. Haines USA: Delaware North of the town of Smyrna, along south bou... W. D. Longbottom 12,408 2009-1-9
GH: 02164807 Dendrolycopodium obscurum (Linnaeus) A. Haines USA: Delaware Owens, along DE Rt. 16, Beach Highway, Redde... W. D. Longbottom 12,413 2009-2-7
Lythraceae GH: 00292189 Trapa natans Linnaeus USA: Maryland Urieville Community Lake, East of the town o... W. D. Longbottom 6138 2005-6-12
Malvaceae GH: 02070920 Abutilon theophrasti Medikus USA: Maryland Queen Anne's Bridge are of Patuxent River Pa... W. D. Longbottom 3738 1993-9-2
GH: 02202082 Anoda cristata (Linnaeus) Schlechtendal USA: Maryland Eastern Shore; Town of Preston, along Mill S... W. D. Longbottom 14,381 2010-11-8
GH: 02202076 Anoda cristata (Linnaeus) Schlechtendal USA: Delaware East of the town of Laurel, DE Rt. 24, Laure... W. D. Longbottom 16,138 2011-9-23
GH: 02202954 Hibiscus laevis Allioni USA: South Carolina Near the Town of St. Stephens, US Rt. 52 at ... W. D. Longbottom [data not capture... 4628 1998-10-3
Mimosaceae GH: 01680273 Mimosa strigillosa Torr. & A. Gray USA: Florida Town of Sanford, at the east end of Oakway W. D. Longbottom David H. Williams... 11014 2008-4-28
Nyctaginaceae GH: 01846388 Mirabilis nyctaginea (Michaux) MacMillan USA: Maryland North of the town of Galestown, along Newhar... W. D. Longbottom 5932 2005-6-1
Onagraceae GH: 01073791 Circaea canadensis canadensis (Linnaeus) Hill USA: Massachusetts Lee: Lee W. D. Longbottom 2263 1991-7-6
GH: 01674676 Circaea canadensis canadensis (Linnaeus) Hill USA: Maryland Solley Cove, Marley Creek opposite the mouth... W. D. Longbottom 3660 1993-6-28
GH: 01674677 Circaea canadensis canadensis (Linnaeus) Hill USA: Maryland East of the town of Easton, Black Dog Alley ... W. D. Longbottom 6154 2005-6-14
GH: 01674678 Circaea canadensis canadensis (Linnaeus) Hill USA: Maryland South River Farms Park on Loch Haven Road in... W. D. Longbottom 3681 1993-7-15
GH: 01674679 Circaea canadensis canadensis (Linnaeus) Hill USA: Maryland Cattail Creek "Pond" just west of MD Rt. 2, ... W. D. Longbottom 3631 1993-6-17
GH: 01779516 Ludwigia grandiflora (Michaux) Greuter & Burdet USA: Maryland North of Showell and south west of Bishopvil... W. D. Longbottom 15,733 2011-8-12
GH: 01645188 Oenothera biennis Linnaeus USA: South Carolina Town of Greeleyville along Rt. 375 about qua... W. D. Longbottom [data not capture... 4615 1998-10-3
Papaveraceae GH: 01738757 Corydalis flavula (Rafinesque) de Candolle USA: Maryland Ropers Branch, Patuxent River. USAF Transmit... W. D. Longbottom [data not capture... 4730 2000-4-16
GH: 01826113 Corydalis micrantha (Engelmann ex A. Gray) A. Gray USA: Delaware [data not captured] W. D. Longbottom 14820 2011-5-2
GH: 01739788 Fumaria officinalis Linnaeus USA: Maryland North of Denton, along River Road near Brick... W. D. Longbottom 12,790 2009-5-24
Pinaceae GH: 00230820 Larix laricina (Du Roi) Koch USA: Massachusetts Lee: Near the intersection of Devon Road and... W. D. Longbottom 3252 1992-7-19
Plantaginaceae GH: 02118073 Penstemon canescens (Britton) Britton USA: North Carolina [data not captured] W. D. Longbottom [data not capture... 2908 1992-5-19
GH: 01805707 Veronica hederifolia Linnaeus USA: Maryland [data not captured] W. D. Longbottom 10978 2008-4-22
Plumbaginaceae GH: 01918080 Limonium carolinianum (Walter) Britton USA: Maryland Town of West Ocean City, along Golf Course R... W. D. Longbottom 12,160 2008-9-6
GH: 01918099 Limonium carolinianum (Walter) Britton USA: New Jersey Town of Avalon, Avalon Blvd. Rt. 601 just we... W. D. Longbottom 3987 1996-8-20
Polemoniaceae GH: 01694941 Polemonium reptans Linnaeus USA: Maryland [data not captured] W. D. Longbottom 5784 2005-5-9
Polygonaceae GH: 02364937 Persicaria glabra (Willdenow) M. Gómez USA: Maryland [data not captured] W. D. Longbottom 2409 1991-8-23
GH: 02363319 Persicaria hydropiperoides (Michaux) Small USA: Maryland [data not captured] W. D. Longbottom 4347 1997-9-18
GH: 02362471 Persicaria pensylvanica (Linnaeus) M. Gomez USA: Maryland [data not captured] W. D. Longbottom 20348 2013-9-10
GH: 02361778 Polygonum aviculare Linnaeus USA: Maryland [data not captured] W. D. Longbottom 4341 1997-9-18
GH: 02006291 Rumex acetosella Linnaeus USA: Maryland [data not captured] W. D. Longbottom 10992 2008-4-25
Pontederiaceae GH: 02068343 Pontederia cordata Linnaeus USA: Maryland Town of Glen Burnie, at the head Marley Cree... W. D. Longbottom [data not capture... 3692 1993-7-16
Potamogetonaceae GH: 01695534 Potamogeton pulcher Tuckerman USA: Maryland Zekiah Swamp, MD Rt. 6, La Plata New Market ... W. D. Longbottom [data not capture... 3498 1993-5-11
Primulaceae GH: 01920965 Lysimachia ciliata Linnaeus USA: Maryland East of the town of Easton, Black Dog Alley ... W. D. Longbottom 6151 2005-6-14
GH: 01918989 Lysimachia quadrifolia Linnaeus USA: Maryland Liberty Reservoir at the end of Oakland Road... W. D. Longbottom 3139 1992-6-16
Ranunculaceae GH: 01657211 Clematis terniflora de Candolle USA: Delaware Rehoboth Beach-Dewey Beach, along Silver Lak... W. D. Longbottom 12,387 2008-11-12
GH: 01657214 Clematis terniflora de Candolle USA: New Jersey Mount Laurel along south bound I-295 north o... W. D. Longbottom 12390 2008-11-14
GH: 01657221 Clematis terniflora de Candolle USA: New Jersey Oldmans Township, along I-295 between mile m... W. D. Longbottom 12386 2008-11-10
GH: 01837186 Ranunculus pusillus Poiret USA: Maryland North west of the town of Berlin, along US R... W. D. Longbottom 5799 2005-5-11
GH: 01839447 Thalictrum pubescens Pursh USA: Maryland Town of Glen Burnie at the head of Marley Cr... W. D. Longbottom [data not capture... 3690 1993-7-16
Rosaceae GH: 01609336 Geum canadense Jacquin USA: Virginia near rest stop on east side of I-81, near th... W. D. Longbottom 4722 1999-8-10
GH: 01590770 Physocarpus opulifolius (Linnaeus) Maximowicz USA: Maryland Zeigler Road at Sideling Hill Creek. Growing... W. D. Longbottom 3604 1993-6-10
Scrophulariaceae GH: 01842919 Glossostigma cleistanthum W. R. Barker USA: Pennsylvania Doylestown, Lake Galena, along shores of the... W. D. Longbottom [data not capture... 12103 2008-8-31
GH: 01842918 Glossostigma cleistanthum W. R. Barker USA: Maryland Salisbury: north east of the intersection of... W. D. Longbottom 12,000 2008-8-13
GH: 01842917 Glossostigma cleistanthum W. R. Barker USA: Maryland Salisbury: Leonard Lane and West Zion Road W. D. Longbottom 12,011 2008-8-14
Urticaceae GH: 02170130 Boehmeria cylindrica (Linnaeus) Swartz USA: Maryland [data not captured] W. D. Longbottom 4345 1997-9-18
Verbenaceae GH: 01953659 Phyla lanceolata (Michaux) Greene USA: Maryland Ed Sears Road underneath park Mills Road at ... W. D. Longbottom [data not capture... 11,801 2008-7-27
Vitaceae GH: 01577173 Nekemias arborea (Linnaeus) J. Wen & Boggan USA: South Carolina Town of Greeleyville along Rt. 375 about qua... W. D. Longbottom [data not capture... 4613 1998-10-3
