FH: 00388677 Amandinea punctata (Hoffmann) Coppins & Scheidegger USA: Nebraska Weeping Water: [data not captured] T. A. Williams 1896
FH: 00388679 Amandinea punctata (Hoffmann) Coppins & Scheidegger USA: Nebraska Weeping Water: [data not captured] T. A. Williams 1896
FH: 00418323 Arthonia dispersa (Schrader) Nylander USA: Nebraska [data not captured] T. A. Williams 1895
FH: 00418546 Arthonia punctiformis Acharius USA: District of Columbia [data not captured] T. A. Williams 1898
FH: 00418585 Arthonia pyrrhuliza Nylander USA: District of Columbia [data not captured] T. A. Williams 1897
FH: 00418585 Arthonia quintaria Nylander USA: District of Columbia [data not captured] T. A. Williams 1897
FH: 00418592 Arthonia quintaria Nylander USA: District of Columbia [data not captured] T. A. Williams 1897
FH: 00418593 Arthonia quintaria Nylander USA: District of Columbia [data not captured] T. A. Williams 1897
FH: 00408986 Buellia disciformis (Fries) Mudd USA: Wyoming [data not captured] T. A. Williams 1897
FH: 00390007 Buellia erubescens Arnold USA: Wyoming [data not captured] T. A. Williams 1897
FH: 00390008 Buellia erubescens Arnold USA: Wyoming [data not captured] T. A. Williams 1897
FH: 00888001 Buellia parasema De Notaris USA: Wyoming [data not captured] T. A. Williams 1897-8-19
FH: 00913944 Buellia punctata (Hoffmann) A. Massalongo USA: Nebraska [data not captured] T. A. Williams 1896-1
FH: 01139807 Dermatocarpon arboreum (Schweinitz ex E. Michener) Fink USA: Maryland [data not captured] T. A. Williams 1898-5
FH: 00439177 Endocarpon pusillum Hedwig USA: Nebraska [data not captured] T. A. Williams 1895-11-26
FH: 00439178 Endocarpon pusillum Hedwig USA: Nebraska [data not captured] T. A. Williams 1895-11-26
FH: 00437810 Graphis scripta (Linnaeus) Acharius USA: South Dakota [data not captured] T. A. Williams 1894-9
FH: 00430462 Lecidoma demissum (Rutström) Gotth. Schneider & Hertel USA: Wyoming [data not captured] T. A. Williams 1897-8-20
FH: 00454294 Micarea prasina Fries USA: Maryland Takoma Park: [no additional data] T. A. Williams 1900-4-2
FH: 00454293 Micarea prasina Fries USA: Maryland Takoma Park: [no additional data] T. A. Williams 1900-4-2
FH: 00471815 Phaeographis dendritica (Acharius) Müller Argoviensis USA: District of Columbia [data not captured] T. A. Williams 1898-5
FH: 00472914 Physcia phaea (Tuckerman) J. W. Thompson USA: Wyoming [data not captured] T. A. Williams 1898-8-19
FH: 00473077 Physcia stellaris (Linnaeus) Nylander USA: Wyoming [data not captured] T. A. Williams 1898-8-19
FH: 00475297 Punctelia bolliana (Müller Arg.) Krog USA: South Dakota [data not captured] T. A. Williams 1895-4
FH: 00475298 Punctelia bolliana (Müller Arg.) Krog USA: South Dakota [data not captured] T. A. Williams 1895-4
FH: 00475299 Punctelia bolliana (Müller Arg.) Krog USA: South Dakota [data not captured] T. A. Williams 1895-4
FH: 00468158 Punctelia rudecta (Acharius) Krog USA: Maryland Takoma Park: [no additional data] T. A. Williams 1896-12
FH: 00468223 Punctelia rudecta (Acharius) Krog USA: Maryland Takoma Park: [no additional data] T. A. Williams
FH: 00475949 Pyrenula neglecta R. C. Harris USA: Maryland Takoma Park: [no additional data] T. A. Williams 1896-12
FH: 00475950 Pyrenula neglecta R. C. Harris USA: Maryland Takoma Park: [no additional data] T. A. Williams 1896-12
FH: 00475949 Pyrenula pseudobufonia (Rehm) R. C. Harris USA: Maryland Takoma Park: [no additional data] T. A. Williams 1896-12
FH: 00475950 Pyrenula pseudobufonia (Rehm) R. C. Harris USA: Maryland Takoma Park: [no additional data] T. A. Williams 1896-12
FH: 00478110 Rinodina dakotensis H. Magnusson USA: South Dakota [data not captured] T. A. Williams 1895-5-11
FH: 00478111 Rinodina dakotensis H. Magnusson USA: South Dakota [data not captured] T. A. Williams 1895-5-11
FH: 00888055 Rinodina dakotensis H. Magnusson USA: South Dakota [data not captured] T. A. Williams 1895-5-11
FH: 00479220 Staurothele catalepta (Acharius) Blomberg & Forssell USA: Nebraska [data not captured] T. A. Williams 1895-11-29
FH: 00479242 Staurothele diffractella (Nylander) Tuckerman USA: Nebraska [data not captured] T. A. Williams 1895-11-30
FH: 00479243 Staurothele diffractella (Nylander) Tuckerman USA: Nebraska [data not captured] T. A. Williams 1895-11
FH: 00479244 Staurothele diffractella (Nylander) Tuckerman USA: Nebraska [data not captured] T. A. Williams 1895-11
FH: 00479245 Staurothele diffractella (Nylander) Tuckerman USA: Nebraska [data not captured] T. A. Williams 1895-11
FH: 00479205 Staurothele drummondii (Tuckerman) Tuckerman USA: Nebraska [data not captured] T. A. Williams 1895-11
FH: 00479205 Staurothele sp. USA: Nebraska [data not captured] T. A. Williams 1895-11
FH: 00455857 Umbilicaria virginis Schaerer USA: Wyoming [data not captured] T. A. Williams 1897-8
FH: 00467713 Xanthoparmelia chlorochroa (Tuckerman) Hale USA: Nebraska [data not captured] T. A. Williams 1890-6-20
FH: 00467714 Xanthoparmelia chlorochroa (Tuckerman) Hale USA: Nebraska [data not captured] T. A. Williams 1893-6-20
FH: 00467715 Xanthoparmelia chlorochroa (Tuckerman) Hale USA: Nebraska [data not captured] T. A. Williams 1890-6
FH: 00468621 Xanthoparmelia stenophylla (Acharius) Ahti & D. Hawksworth USA: Wyoming [data not captured] T. A. Williams 1898-8-19
FH: 00468640 Xanthoparmelia stenophylla (Acharius) Ahti & D. Hawksworth USA: Maryland [data not captured] T. A. Williams 1900
FH: 00468667 Xanthoparmelia stenophylla (Acharius) Ahti & D. Hawksworth USA: Maryland [data not captured] T. A. Williams 1900
FH: 00467694 Xanthoparmelia wyomingica (Gyelnik) Hale USA: Wyoming [data not captured] T. A. Williams 1898-8-19
Acarosporaceae FH: 00388088 Acarospora pelioscypha (Wahlenberg) Th. Fries USA: Nebraska [data not captured] T. A. Williams 1896-1
FH: 00302171 Acarospora socialis H. Magnusson USA: Wyoming Green River T. A. Williams 1897-7-8
FH: 00302173 Acarospora strigata (Nylander) Jatta USA: Wyoming Green River T. A. Williams 1897-7-8
Aceraceae A: 01792282 Acer negundo violaceum (G. Kirchner) H. Jaeger USA: South Dakota Big Stone T. A. Williams 159 1894-8-14
Agaricaceae FH: 00555539 Flammulina velutipes (Curtis: Fries) Singer USA: Nebraska [data not captured] T. A. Williams s.n. 1889-11-12
Alismataceae GH: 01632201 Echinodorus berteroi (Sprengel) Fassett USA: South Dakota Brookings (South Dakota): Vicinity of Brooki... T. A. Williams 1892-8-10
Anacardiaceae A: 01868287 Rhus trilobata Nuttall USA: South Dakota Porcupine Creek T. A. Williams
Araceae GH: 01654348 Arisaema triphyllum pusillum (Peck) Huttleston USA: District of Columbia Rock Creek T. A. Williams 1898-4-25
Asclepiadaceae GH: 01046693 Asclepias viridiflora Rafinesque USA: Maryland Upper Marlboro T. A. Williams [data not captured] 1900-7-15
Asteraceae GH: 00968347 Artemisia campestris caudata (Michaux) H. M. Hall & Clements USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1894-9
GH: 00968345 Artemisia campestris caudata (Michaux) H. M. Hall & Clements USA: South Dakota Vicinity of Brookings T. A. Williams 1894-9
GH: 02142138 Chondrilla juncea Linnaeus USA: District of Columbia Washington: [data not captured] T. A. Williams 1896-10-11
GH: 02216700 Chrysothamnus viscidiflorus lanceolatus (Nuttall) H. M. Hall & Clements USA: Wyoming Green River T. A. Williams 1897-7-9
GH: 02020887 Cirsium flodmanii (Rydberg) Arthur USA: South Dakota Vicinity of Brookings T. A. Williams 1893-8-30
GH: 02013002 Cirsium undulatum (Nuttall) Sprengel USA: South Dakota Canning T. A. Williams 1892-8
GH: 02013000 Cirsium undulatum (Nuttall) Sprengel USA: South Dakota Canning T. A. Williams 1892-8
GH: 02205534 Ericameria nauseosa (Pallas ex Pursh) G. L. Nesom & G. I. Baird USA: Wyoming Crazy Woman Creek T. A. Williams 1897-7-31
GH: 02207806 Erigeron bellidiastrus Nuttall USA: South Dakota Lower White Rivers T. A. Williams 87
GH: 02352603 Erigeron philadelphicus Linnaeus USA: Nebraska Ashland T. A. Williams 1890-5-10
GH: 02204556 Heterotheca villosa ballardii (Rydberg) Semple USA: South Dakota Lower White River T. A. Williams 86
GH: 01834484 Lactuca floridana (Linnaeus) Gaertner USA: Maryland [data not captured] T. A. Williams 1898-8-17
GH: 01834715 Lactuca ludoviciana (Nuttall) Riddell USA: South Dakota Vicinity of Brookings T. A. Williams 1894-7-10
GH: 01834714 Lactuca ludoviciana (Nuttall) Riddell USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1895-7-1
GH: 02192606 Liatris pilosa (Aiton) Willdenow USA: Maryland Takoma Park: [no additional data] T. A. Williams 1897-10-6
GH: 02213295 Liatris scariosa (Linnaeus) Willdenow USA: South Dakota State line between S. D. and Minn. T. A. Williams 1896-8-10
GH: 01835841 Malacothrix torreyi A. Gray USA: Wyoming Solon T. A. Williams 1897-7
Bartramiaceae FH: 00516999 Bartramia pomiformis Hedwig USA: Maryland [data not captured] T. A. Williams 1896-4-16
Betulaceae A: 02193362 Betula pendula Roth USA: South Dakota Vicinity of Brookings T. A. Williams 1894-8-28
A: 02071007 Betula sp. USA: South Dakota Vicinity of Brookings T. A. Williams 1893-5-19
A: 02071361 Carpinus caroliniana virginiana (Marshall) Furlow USA: District of Columbia [data not captured] T. A. Williams 1898-7-27
A: 02103637 Ostrya virginiana (Miller) K. Koch USA: South Dakota Cobbs Creek. T. A. Williams 48 1894-8-9
Boraginaceae GH: 01995692 Lithospermum canescens (Michaux) Lehmann USA: South Dakota Vicinity of Brookings T. A. Williams 1897-5-29
GH: 01996838 Lithospermum occidentale (Mackenzie) Weakley, Witsell & D. Estes USA: South Dakota Big Stone. T. A. Williams 218 1894-8-16
GH: 02060641 Oreocarya glomerata (Pursh) Greene USA: South Dakota Cheyenne River T. A. Williams 1891-8-10
GH: 02060677 Oreocarya glomerata (Pursh) Greene USA: Wyoming Cheyenne River T. A. Williams
Brassicaceae GH: 01097981 Camelina microcarpa Andrzejowski ex de Candolle USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 104 1892-7
GH: 00986060 Conringia orientalis (Linnaeus) Dumortier USA: South Dakota Brookings (South Dakota): Vicinity of Brooki... T. A. Williams 1895-9
GH: 01115827 Draba nemorosa Linnaeus USA: South Dakota Vicinity of Brookings T. A. Williams 1895-5-25
GH: 01561127 Draba reptans (Lamarck) Fernald USA: Wisconsin [data not captured] T. A. Williams 1895-4-27
GH: 01575083 Physaria brassicoides Rydberg USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1895-5-7
GH: 01693075 Rorippa sinuata (Nuttall) Hitchcock USA: South Dakota Vicinity of Brookings. College Farm T. A. Williams 1895-6-8
GH: 01693076 Rorippa sinuata (Nuttall) Hitchcock USA: South Dakota Vicinity of Brookings T. A. Williams 1897-5-29
Caesalpiniaceae A: 01676084 Gleditsia triacanthos Linnaeus USA: South Dakota Missouri River valley T. A. Williams
Candelariaceae FH: 00409571 Candelaria concolor (Dickson) Arnold USA: Nebraska [data not captured] T. A. Williams 1895
FH: 00409572 Candelaria concolor (Dickson) Arnold USA: Nebraska [data not captured] T. A. Williams 1895
FH: 00409574 Candelaria concolor (Dickson) Arnold USA: South Dakota [data not captured] T. A. Williams 1895
FH: 00409575 Candelaria concolor (Dickson) Arnold USA: South Dakota [data not captured] T. A. Williams 1895
FH: 01141161 Candelaria concolor effusa Tuckerman USA: Nebraska [data not captured] T. A. Williams 1895-11-14
FH: 01141162 Candelaria concolor effusa Tuckerman USA: South Dakota [data not captured] T. A. Williams 1895-4
FH: 00409594 Candelaria fibrosa (Fries) Müller Arg. USA: Virginia [data not captured] T. A. Williams 1899
Caprifoliaceae A: 02038001 Lonicera dioica Linnaeus USA: South Dakota Bigstone T. A. Williams 1895-6-13
A: 02036298 Symphoricarpos occidentalis Hooker USA: South Dakota Brookings T. A. Williams 4226 1893
A: 02036301 Symphoricarpos occidentalis Hooker USA: South Dakota Devil's Tower T. A. Williams 1897-8-18
A: 02036315 Symphoricarpos occidentalis Hooker USA: Nebraska Ashland T. A. Williams 1890
GH: 02036327 Symphoricarpos occidentalis Hooker USA: Nebraska Wabash T. A. Williams 178 1889-7-22
A: 02035219 Symphoricarpos sp. USA: South Dakota Big Stone Lake T. A. Williams 164 1894-8-15
A: 02185918 Viburnum lentago Linnaeus USA: South Dakota Vicinity of Brookings T. A. Williams 1893-6-9
A: 02185917 Viburnum lentago Linnaeus USA: South Dakota Big Stone T. A. Williams 87 1894-8-10
Caryophyllaceae GH: 01741564 Arenaria hookeri Nuttall ex Torrey & A. Gray USA: Wyoming Solon T. A. Williams 1897
GH: 01743870 Cerastium glomeratum Thuillier USA: South Dakota Sioux Falls T. A. Williams 1896-6-5
Celastraceae A: 01854254 Celastrus scandens Linnaeus USA: South Dakota Big Stone T. A. Williams 88 1894-8-13
A: 01854807 Euonymus atropurpureus Jacquin USA: Nebraska Elmwood T. A. Williams 1890-6
A: 01854808 Euonymus atropurpureus Jacquin USA: Nebraska Elmwood T. A. Williams 1890-6
Chenopodiaceae GH: 01781545 Blitum nuttallianum Schultes USA: South Dakota Lake Campbell T. A. Williams 1894-10
GH: 01782442 Chenopodium berlandieri zschackii (Murr) Murr ex Ascherson USA: South Dakota Iroquois T. A. Williams 1895-8-5
GH: 01782767 Chenopodium pratericola Rydberg USA: South Dakota Bigstone T. A. Williams
GH: 01783958 Salsola tragus Linnaeus USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1892-8
Cladoniaceae FH: 00406425 Cladonia bacillaris (Acharius) Genth USA: Maryland [data not captured] T. A. Williams 1896-11-22
FH: 00412017 Cladonia caespiticia (Persoon) Flörke USA: Maryland Takoma Park: [data not captured] T. A. Williams 1899-10-11
FH: 01139857 Cladonia caespiticia (Persoon) Flörke USA: District of Columbia [data not captured] T. A. Williams 1899-10-11
FH: 00412592 Cladonia cervicornis verticillata (Hoffmann) Ahti USA: Maryland [data not captured] T. A. Williams 17 1897-12
FH: 00412668 Cladonia cervicornis verticillata (Hoffmann) Ahti USA: Maryland Takoma Park: [data not captured] T. A. Williams 1896-12
FH: 00412669 Cladonia cervicornis verticillata (Hoffmann) Ahti USA: Maryland Takoma Park: [data not captured] T. A. Williams 1896-12
FH: 00411966 Cladonia cristatella Tuckerman USA: Maryland Takoma Park: [data not captured] T. A. Williams 7 1896
FH: 00411967 Cladonia cristatella Tuckerman USA: Maryland [data not captured] T. A. Williams 21 1898
FH: 01139955 Cladonia delicata (Ehrhart) Flörke USA: District of Columbia [data not captured] T. A. Williams 1897-5-1
FH: 00405474 Cladonia fimbriata (Linnaeus) Fries USA: Colorado [data not captured] T. A. Williams 1899
FH: 00428473 Cladonia grayi G. Merrill ex Sandstede USA: Maryland Takoma Park: [data not captured] T. A. Williams 25 1899-11
FH: 01140073 Cladonia mitrula Tuckerman USA: Maryland Chevy Chase: [no additional data] T. A. Williams 1896-12
FH: 01140099 Cladonia papillaria (Ehrhart) Hoffmann USA: District of Columbia [data not captured] T. A. Williams 1898-12
FH: 00370853 Cladonia parasitica (Hoffmann) Hoffmann USA: District of Columbia Washington: [data not captured] T. A. Williams 1897-5-1
FH: 00370854 Cladonia parasitica (Hoffmann) Hoffmann USA: District of Columbia Washington: [data not captured] T. A. Williams 1897-5-1
FH: 00370931 Cladonia peziziformis (Withering) J. R. Laundon USA: Maryland [data not captured] T. A. Williams 1896-12
FH: 00370932 Cladonia peziziformis (Withering) J. R. Laundon USA: Maryland [data not captured] T. A. Williams 1896-12
FH: 00440077 Cladonia peziziformis (Withering) J. R. Laundon USA: District of Columbia Washington: [data not captured] T. A. Williams 12 1896-12-6
FH: 00391154 Cladonia subcariosa Nylander USA: District of Columbia Washington: [data not captured] T. A. Williams 1897-2-15
FH: 00391155 Cladonia subcariosa Nylander USA: District of Columbia Washington: [data not captured] T. A. Williams 1537 1898-5
FH: 00391188 Cladonia subcariosa pleurocarpa Robbins bis USA: District of Columbia Washington: [data not captured] T. A. Williams 19 1897-1
FH: 01140298 Cladonia verticillata (Hoffmann) Schaerer USA: Maryland [data not captured] T. A. Williams 1896-12
FH: 00475467 Pycnothelia papillaria molariformis (Hoffmann) Schaerer USA: District of Columbia [data not captured] T. A. Williams 1898-12
FH: 00475469 Pycnothelia papillaria molariformis (Hoffmann) Schaerer USA: District of Columbia [data not captured] T. A. Williams 1898-12
FH: 00475470 Pycnothelia papillaria molariformis (Hoffmann) Schaerer USA: District of Columbia [no additional data] T. A. Williams
Coccocarpiaceae FH: 01139672 Coccocarpia molybdaea Persoon USA: Maryland [data not captured] T. A. Williams 1897-12
FH: 00407831 Coccocarpia palmicola (Sprengel) Arvidsson & D. J. Galloway USA: Maryland [data not captured] T. A. Williams 1897-12
FH: 00407832 Coccocarpia palmicola (Sprengel) Arvidsson & D. J. Galloway USA: Maryland [data not captured] T. A. Williams 1897-12
Collemataceae FH: 00393324 Collema ryssoleum (Tuckerman) A. Schneider USA: Maryland [data not captured] T. A. Williams 1897-6
FH: 00393327 Collema ryssoleum (Tuckerman) A. Schneider USA: Maryland [data not captured] T. A. Williams 1897-6
FH: 01139692 Collema ryssoleum (Tuckerman) A. Schneider USA: Maryland [data not captured] T. A. Williams 1897-6
Commelinaceae GH: 02113444 Tradescantia bracteata Small USA: South Dakota Vicinity of Brookings T. A. Williams 1892-6-25
Cornaceae A: 01843798 Cornus amomum Miller USA: Maryland Glen Sligo T. A. Williams 1898-6-23
GH: 01845194 Cornus drummondii C. A. Meyer USA: Nebraska weeping Water T. A. Williams 177 1889-7-20
A: 02019371 Cornus stolonifera Michaux USA: South Dakota Bigstone T. A. Williams 80 1894-8-10
A: 02019369 Cornus stolonifera Michaux USA: South Dakota [no additional data] T. A. Williams 323
Cupressaceae A: 02104530 Juniperus communis montana Aiton USA: Colorado Florissant. T. A. Williams 1896-7-25
A: 02105215 Juniperus horizontalis Moench USA: Wyoming Clear Creek; Big Horn Mts T. A. Williams 1898-7-27
A: 02106413 Juniperus scopulorum Sargent USA: Wyoming Devil's Tower, Little Missouri Buttes T. A. Williams 1897-8-13
A: 02107090 Juniperus sp. USA: South Dakota Badlands ten miles southwest of Stearns. T. A. Williams
A: 02106996 Juniperus virginiana Linnaeus USA: Virginia [data not captured] T. A. Williams 1897-5-26
Cyperaceae GH: 02371770 Carex annectens (E. P. Bicknell) E. P. Bicknell USA: District of Columbia [data not captured] T. A. Williams 1897-5-26
GH: 02315029 Carex brevipes W. Boott ex B. D. Jackson USA: Wyoming Trusleep Lakes, Big Horn Mts. T. A. Williams 2972 1897-8-19
GH: 02392209 Carex brunnescens (Persoon) Poiret USA: Wyoming Ten Sleep Lakes. Big Horn Mts. T. A. Williams 2965 1897
GH: 02393715 Carex canescens Linnaeus USA: Wyoming Near head of Powder River T. A. Williams 1897
GH: 02393713 Carex canescens Linnaeus USA: Wyoming Near head of Powder River T. A. Williams 1897
GH: 02393711 Carex canescens Linnaeus USA: Wyoming Tensleep Lakes, Big Horn Mts. T. A. Williams 2949 1897-8-19
GH: 02315029 Carex deflexa boottii L. H. Bailey USA: Wyoming Trusleep Lakes, Big Horn Mts. T. A. Williams 2972 1897-8-19
GH: 02368781 Carex douglasii Boott USA: Wyoming Little Laramie R. T. A. Williams 2284 1897-7-2
GH: 02368933 Carex duriuscula C. A. Meyer USA: Wyoming near head of Powder River T. A. Williams 1897
GH: 02368924 Carex duriuscula C. A. Meyer USA: Wyoming Mututse Creek T. A. Williams 1897-8-9
GH: 02370435 Carex hoodii Boott USA: Wyoming Near head of Powder River T. A. Williams 1897
GH: 02578522 Carex laeviconica Dewey USA: Nebraska [data not captured] T. A. Williams 59 1890-5-31
GH: 01772964 Carex lurida Wahlenberg USA: Virginia [data not captured] T. A. Williams 1897-5-26
GH: 01773049 Carex lurida Wahlenberg USA: District of Columbia [data not captured] T. A. Williams 1899-6-5
GH: 01773050 Carex lurida Wahlenberg USA: District of Columbia [data not captured] T. A. Williams 1899-6-5
GH: 01773450 Carex retrorsa Schweinitz USA: South Dakota Brookings (South Dakota): [data not captured... T. A. Williams 1897-7-4
GH: 01775102 Carex saxatilis Linnaeus USA: Wyoming [data not captured] T. A. Williams 1897
GH: 01771458 Carex sp. USA: Wyoming Near head of Powder River T. A. Williams 1897
GH: 01773870 Carex utriculata Boott USA: Wyoming [data not captured] T. A. Williams
GH: 01773872 Carex utriculata Boott USA: Wyoming [data not captured] T. A. Williams 1897
GH: 01773873 Carex utriculata Boott USA: Wyoming [data not captured] T. A. Williams 1897
GH: 01773876 Carex utriculata Boott USA: Wyoming [data not captured] T. A. Williams 2975 1897-8-19
GH: 01774887 Carex vesicaria Linnaeus USA: Wyoming [data not captured] T. A. Williams 1897
GH: 01774892 Carex vesicaria Linnaeus USA: Wyoming [data not captured] T. A. Williams 1897
Dermateaceae FH: 00454162 Melaspilea demissa (Tuckerman) Zahlbruckner USA: District of Columbia [data not captured] T. A. Williams 1898-4
FH: 00454163 Melaspilea demissa (Tuckerman) Zahlbruckner USA: District of Columbia [data not captured] T. A. Williams 1898-4
Ditrichaceae FH: 00793299 Distichium capillaceum (Hedwig) Bruch & Schimper USA: South Dakota [data not captured] T. A. Williams 1896-8
Elaeagnaceae A: 01576103 Elaeagnus angustifolia Linnaeus USA: South Dakota Sioux Falls T. A. Williams 1896-6
A: 01576104 Elaeagnus angustifolia Linnaeus USA: South Dakota Sioux Falls T. A. Williams 1896-06
GH: 01576460 Shepherdia argentea (Pursh) Nuttall USA: South Dakota Sioux Falls T. A. Williams 1896-6-5
A: 01576463 Shepherdia argentea (Pursh) Nuttall USA: South Dakota Devils Tower T. A. Williams 1897-8-18
A: 01576490 Shepherdia argentea (Pursh) Nuttall USA: Wyoming Devil's Tower, Little Missouri Buttes T. A. Williams 1897-8-14
A: 01576489 Shepherdia argentea (Pursh) Nuttall USA: Wyoming Cheyenne River T. A. Williams
GH: 01576960 Shepherdia canadensis Nuttall USA: South Dakota Rapid City (South Dakota): [no additional da... T. A. Williams 1891-8
Ericaceae A: 01591515 Eubotrys racemosa (Linnaeus) Nuttall USA: Maryland Takoma Park: [no additional data] T. A. Williams 1900-5-22
A: 01592377 Gaylussacia baccata (Wangenheim) K. Koch USA: District of Columbia Takoma Park T. A. Williams 1899-5-5
A: 01592379 Gaylussacia baccata (Wangenheim) K. Koch USA: District of Columbia Takoma Park T. A. Williams 1899-5-5
A: 01592380 Gaylussacia baccata (Wangenheim) K. Koch USA: District of Columbia Takoma Heights T. A. Williams 1898-5-15
A: 01592381 Gaylussacia baccata (Wangenheim) K. Koch USA: District of Columbia Takoma Park T. A. Williams 1897-5-11
A: 01592382 Gaylussacia baccata (Wangenheim) K. Koch USA: District of Columbia Takoma Park T. A. Williams 1898-7-3
GH: 01718247 Lyonia mariana (Linnaeus) D. Don USA: Maryland Lakoma Park T. A. Williams 1897-5-30
A: 01718249 Lyonia mariana (Linnaeus) D. Don USA: Maryland Takoma Park. T. A. Williams 1899-6-13
A: 01718251 Lyonia mariana (Linnaeus) D. Don USA: Maryland Takoma Park T. A. Williams 1897-6-5
GH: 01761119 Pyrola chlorantha Swartz USA: Nebraska War Bonnet Canon T. A. Williams 1890-6-23
A: 01764583 Rhododendron periclymenoides (Michaux) Shinners USA: District of Columbia [data not captured] T. A. Williams 1897-5-12
A: 01765404 Rhododendron viscosum (Linnaeus) Torrey USA: District of Columbia [data not captured] T. A. Williams 1897-5-30
Erysiphaceae FH: 00972829 Blumeria graminis (de Candolle) Speer USA: South Dakota Lake Hendricks T. A. Williams 1891-8
FH: 00972829 Erysiphe graminis de Candolle USA: South Dakota Lake Hendricks T. A. Williams 1891-8
Fabaceae A: 01967661 Amorpha canescens Pursh USA: South Dakota Big Stone T. A. Williams 160 1894-8-15
A: 01935309 Amorpha fruticosa Linnaeus USA: South Dakota Sioux Falls T. A. Williams 1896-6-5
A: 01935308 Amorpha fruticosa Linnaeus USA: South Dakota Cottonwood Creek, Bad River T. A. Williams
A: 01935306 Amorpha fruticosa Linnaeus USA: South Dakota Big Stone T. A. Williams 161 1894-8-15
A: 01935621 Amorpha nana Nuttall USA: South Dakota Bluffs of the Missouri, Ft. Pierre T. A. Williams 1891-8-4
GH: 02067696 Astragalus agrestis G. Don USA: South Dakota Oakwood Lakes T. A. Williams 1892-6-4
GH: 02067699 Astragalus agrestis G. Don USA: South Dakota Oakwood T. A. Williams 1892-7-1
GH: 02048409 Astragalus racemosus Pursh USA: Wyoming Cheyenne River T. A. Williams
GH: 01921698 Dalea sp. USA: South Dakota Lower White River T. A. Williams 71
GH: 01959676 Glycyrrhiza lepidota Nuttall ex Pursh USA: South Dakota Brookings T. A. Williams 123 1892-7
GH: 02137470 Tephrosia virginiana (Linnaeus) Persoon USA: Maryland Takoma Park: [data not captured] T. A. Williams 1899-6-11
GH: 02345127 Vicia americana Muhlenberg ex Willdenow USA: South Dakota Vicinity of Brookings T. A. Williams 1891-6-25
GH: 02345126 Vicia americana Muhlenberg ex Willdenow USA: South Dakota Vicinity of Brookings T. A. Williams 1891-6-25
GH: 02345543 Vicia caroliniana Walter USA: District of Columbia [data not captured] T. A. Williams 1898-4-25
GH: 02347567 Vicia villosa Roth USA: South Dakota Vicinity of Brookings T. A. Williams 1895-9-14
Haloragaceae GH: 01628323 Myriophyllum sibiricum Komarov USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1894-8
Hydrangeaceae A: 01750973 Hydrangea arborescens Linnaeus USA: Maryland Glen Sligo [?] T. A. Williams 1898-6-23
Incertae sedis FH: 00418901 Arthothelium dispersum (de Candolle) Mudd USA: Nebraska [data not captured] T. A. Williams 1895
Juncaceae GH: 02101488 Juncus confusus Coville USA: Wyoming Head of Powder River T. A. Williams
GH: 02396335 Juncus sp. USA: Wyoming Head of Powder River T. A. Williams
GH: 02396334 Juncus sp. USA: Wyoming Head of Powder River T. A. Williams
Lamiaceae GH: 01552505 Lycopus asper Greene USA: South Dakota Lake Campbell T. A. Williams 1894-10
GH: 01551462 Mentha arvensis Linnaeus USA: South Dakota [no additional data] T. A. Williams 121 1894-8
GH: 01599334 Monarda fistulosa mollis (Linnaeus) Bentham USA: South Dakota Brookings (South Dakota): Sioux River T. A. Williams 1892-8
GH: 01597978 Pycnanthemum tenuifolium Schrader USA: Maryland Takoma Park: [no additional data] T. A. Williams 1898-7-20
GH: 01696178 Salvia lyrata Linnaeus USA: Maryland Takoma Park: [no additional data] T. A. Williams 1900-5-23
GH: 01698728 Scutellaria serrata Sprengel USA: Maryland Glen Sligo T. A. Williams 1899-5-30
Lecanoraceae FH: 00419307 Aspicilia gibbosa (Acharius) Körber USA: Montana [data not captured] T. A. Williams 1898
FH: 00451174 Lecanora dispersa (Persoon) Röhling USA: Nebraska [data not captured] T. A. Williams 1895-1
FH: 00451175 Lecanora dispersa (Persoon) Röhling USA: Nebraska [data not captured] T. A. Williams 1895-1
FH: 01140471 Lecanora effusa (Hoffmann) Acharius USA: Nebraska [data not captured] T. A. Williams 1895-11
FH: 01140487 Lecanora hagenii (Acharius) Acharius USA: Nebraska [data not captured] T. A. Williams 1895-1
FH: 00451320 Lecanora invadens H. Magnusson USA: Nebraska [data not captured] T. A. Williams 1895-11-30
FH: 00941170 Lecanora melanaspis alphoplaca (Wahlenberg) Th. Fries USA: Wyoming Green River T. A. Williams 1897-7
FH: 00941172 Lecanora melanaspis alphoplaca (Wahlenberg) Th. Fries USA: Wyoming Green River T. A. Williams 1897-7
FH: 00451832 Lecanora saligna (Schrader) Zahlbruckner USA: Nebraska Weeping Water: [no additional data] T. A. Williams 1895-11
FH: 00451833 Lecanora saligna (Schrader) Zahlbruckner USA: Nebraska Weeping Water: [no additional data] T. A. Williams 1895-11
FH: 00302171 Lecanora xanthophana dealbata Tuckerman USA: Wyoming Green River T. A. Williams 1897-7-8
FH: 00302173 Lecanora xanthophana dealbata Tuckerman USA: Wyoming Green River T. A. Williams 1897-7-8
FH: 01140580 Lecanora xanthophana dealbata Tuckerman USA: Wyoming [data not captured] T. A. Williams 1897-7-8
FH: 00476224 Pyrrhospora varians (Acharius) R. C. Harris USA: Nebraska [data not captured] T. A. Williams 1895-11-29
FH: 00476225 Pyrrhospora varians (Acharius) R. C. Harris USA: Nebraska [data not captured] T. A. Williams 1895-11
Lecideaceae FH: 00419643 Bacidia polychroa (Th. Fries) Körber USA: Maryland [data not captured] T. A. Williams 1896
FH: 00419925 Bacidia schweinitzii (Fries ex Tuckerman) A. Schneider USA: District of Columbia [data not captured] T. A. Williams 1896
FH: 00452709 Lecidea cyrtidia Tuckerman USA: District of Columbia Washington: [data not captured] T. A. Williams 1898-1-23
FH: 00452710 Lecidea cyrtidia Tuckerman USA: District of Columbia Washington: [data not captured] T. A. Williams 1898-1-23
FH: 00452974 Lecidea paddensis (Tuckerman) Zahlbruckner USA: Montana Missoula: [no additional data] T. A. Williams 1898-9
FH: 00452977 Lecidea paddensis (Tuckerman) Zahlbruckner USA: Montana Missoula: [no additional data] T. A. Williams 1898-9-6
FH: 00476224 Lecidea varians Acharius USA: Nebraska [data not captured] T. A. Williams 1895-11-29
FH: 00476225 Lecidea varians Acharius USA: Nebraska [data not captured] T. A. Williams 1895-11
Megasporaceae FH: 00941170 Lobothallia praeradiosa (Nylander) Hafellner USA: Wyoming Green River T. A. Williams 1897-7
FH: 00941172 Lobothallia praeradiosa (Nylander) Hafellner USA: Wyoming Green River T. A. Williams 1897-7
Melampsoraceae FH: 00989443 Melampsora abietis-caprearum Tubeuf USA: South Dakota Oakwood Lakes T. A. Williams 1892-10-22
Monoblastiaceae FH: 00454357 Microthelia micula Körber USA: Nebraska Weeping Water: [no additional data] T. A. Williams 1895-11-29
FH: 00454330 Microthelia sp. USA: Nebraska Weeping Water: [no additional data] T. A. Williams 1895-11
Nyctaginaceae GH: 01641814 Mirabilis hirsuta (Pursh) MacMillan USA: Nebraska Weeping Water: [no additional data] T. A. Williams 1890-7-4
Oleaceae GH: 01846797 Chionanthus virginicus Linnaeus USA: Maryland Takoma Park: [no additional data] T. A. Williams 1898-5-15
A: 01846798 Chionanthus virginicus Linnaeus USA: Maryland Takoma Park: [no additional data] T. A. Williams 1898-5-18
A: 01849749 Fraxinus pennsylvanica Marshall USA: South Dakota Cobbs Creek T. A. Williams 28 1894-8-9
Onagraceae GH: 01625799 Camissonia minor (A. Nelson) P. H. Raven USA: Wyoming Solon T. A. Williams 1897-7
GH: 01672975 Epilobium ciliatum Rafinesque USA: South Dakota Rapid City (South Dakota): [no additional da... T. A. Williams 1891-8
GH: 01644652 Oenothera laciniata Hill USA: Wyoming Wind River T. A. Williams
Opegraphaceae FH: 00454162 Opegrapha demissa Tuckerman USA: District of Columbia [data not captured] T. A. Williams 1898-4
FH: 00454163 Opegrapha demissa Tuckerman USA: District of Columbia [data not captured] T. A. Williams 1898-4
FH: 00467149 Opegrapha varia Persoon USA: South Dakota [data not captured] T. A. Williams 1895-4
FH: 00467150 Opegrapha varia Persoon USA: South Dakota [data not captured] T. A. Williams 1895-4
FH: 00467202 Opegrapha vulgata (Acharius) Acharius USA: District of Columbia [data not captured] T. A. Williams 1900-4-2
Orchidaceae AMES: 01938168 Corallorhiza maculata (Rafinesque) Rafinesque USA: Nebraska WarBonnet Canyon T. A. Williams 1890-6-20
AMES: 01937728 Cypripedium candidum Muhlenberg ex Willdenow USA: South Dakota Near Brookings T. A. Williams 1893-6-16
AMES: 02065538 Galearis spectabilis (Linnaeus) Rafinesque USA: District of Columbia Rock Creek T. A. Williams 1898-5-10
AMES: 02028103 Goodyera pubescens (Willdenow) R. Brown USA: District of Columbia Lay farm T. A. Williams 1898-7-26
Orobanchaceae GH: 02034468 Agalinis setacea (J. F. Gmelin) Rafinesque USA: Maryland Takoma Park: [no additional data] T. A. Williams 1899-9-10
GH: 02034854 Agalinis tenuifolia parviflora (Nuttall) Pennell USA: South Dakota Waltertown T. A. Williams 1895-7-27
GH: 01880141 Cordylanthus ramosus Nuttall ex Bentham USA: Wyoming Green River T. A. Williams 1897-7-9
GH: 02080149 Pedicularis canadensis Linnaeus USA: South Dakota Vicinity of Brookings T. A. Williams 1897-5-29
Oxalidaceae GH: 01585287 Oxalis dillenii Jacquin USA: South Dakota Brookings (South Dakota): Vicinity of Brooki... T. A. Williams 1895-8-6
GH: 01585445 Oxalis florida Salisbury USA: Maryland Glen Sligo T. A. Williams 1899-5-30
Pannariaceae FH: 00437208 Fuscopannaria leucosticta (Tuckerman) P. M. Jørgensen USA: Maryland [data not captured] T. A. Williams 1897-12
FH: 00437209 Fuscopannaria leucosticta (Tuckerman) P. M. Jørgensen USA: Maryland [data not captured] T. A. Williams 1897-12
Parmeliaceae FH: 00413007 Cetraria aculeata (Schreber) Fries USA: Wyoming [data not captured] T. A. Williams
FH: 00413008 Cetraria aculeata (Schreber) Fries USA: Wyoming [data not captured] T. A. Williams 1898
FH: 00413159 Cetraria fendleri (Nylander) Tuckerman USA: Maryland Takoma Park: [data not captured] T. A. Williams 1897
FH: 00413162 Cetraria fendleri (Nylander) Tuckerman USA: Maryland Takoma Park: [data not captured] T. A. Williams 1897
FH: 01141371 Coelocaulon aculeatum (Schreber) Link USA: Wyoming [data not captured] T. A. Williams 1898-8-1
FH: 00438316 Imshaugia placorodia (Acharius) S. L. F. Meyer USA: District of Columbia Washington: [data not captured] T. A. Williams 1898-3
FH: 00438317 Imshaugia placorodia (Acharius) S. L. F. Meyer USA: District of Columbia Washington: [data not captured] T. A. Williams 1898-3
FH: 01140659 Parmelia borreri (Smith) Turner USA: South Dakota [data not captured] T. A. Williams 1895-4
FH: 01140692 Parmelia borreri rudecta (Acharius) Tuckerman USA: Maryland [data not captured] T. A. Williams 1896-12
FH: 00467694 Parmelia molliuscula Acharius USA: Wyoming [data not captured] T. A. Williams 1898-8-19
FH: 00467713 Parmelia molliuscula Acharius USA: Nebraska [data not captured] T. A. Williams 1890-6-20
FH: 00467714 Parmelia molliuscula Acharius USA: Nebraska [data not captured] T. A. Williams 1893-6-20
FH: 00467715 Parmelia molliuscula Acharius USA: Nebraska [data not captured] T. A. Williams 1890-6
FH: 01140860 Parmelia molliuscula Acharius USA: Nebraska [data not captured] T. A. Williams 1893-6-20
FH: 00468667 Parmelia stenophylla imbricata (A. Massalongo) Lettau USA: Maryland [data not captured] T. A. Williams 1900
FH: 01141129 Parmeliopsis aleurites (Acharius) Nylander USA: District of Columbia [data not captured] T. A. Williams 1898-3
Pertusariaceae FH: 00471499 Pertusaria pustulata (Acharius) Duby USA: District of Columbia [data not captured] T. A. Williams 1898-4
FH: 00471503 Pertusaria pustulata (Acharius) Duby USA: District of Columbia [data not captured] T. A. Williams 1898-4
FH: 00888115 Pertusaria pustulata (Acharius) Duby USA: District of Columbia Washington: [data not captured] T. A. Williams 1898-4
Phytolaccaceae GH: 01681242 Phytolacca americana Linnaeus USA: District of Columbia [data not captured] T. A. Williams 1896-10-10
Plantaginaceae GH: 01998000 Chelone glabra Linnaeus USA: Maryland Takoma Park: [data not captured] T. A. Williams 1900-10-8
GH: 02001023 Linaria vulgaris Miller USA: South Dakota Vicinity of Brookings T. A. Williams 1894-6-30
GH: 02001990 Penstemon albidus Nuttall USA: South Dakota Big Stone Lake T. A. Williams 1895-6-14
GH: 02119752 Penstemon glaber Pursh USA: Nebraska War Bonnet Cañon T. A. Williams 52 1890-6-24
GH: 02121886 Penstemon procerus Douglas ex Graham USA: Wyoming Crazy Woman Creek. T. A. Williams 1897-7-31
GH: 01802068 Plantago elongata Pursh USA: Nebraska Lincoln (Nebraska): [no additional data] T. A. Williams 19 1890-5-30
GH: 01811248 Veronica peregrina xalapensis (Kunth) Pennell USA: South Dakota Sioux Falls. T. A. Williams 1896-6-5
Poaceae GH: 02579170 Agrostis humilis Vasey USA: Wyoming Tensleep Lakes T. A. Williams 2952 1897
GH: 01814171 Erianthus contortus Elliott USA: Virginia Virginia Beach (Virginia): [data not capture... T. A. Williams 3112 1900-9-22
GH: 00024306 Poa fendleriana fendleriana USA: Wyoming T. A. Williams 2302 1897
GH: 00024306 Poa longipedunculata viridescens T. A. Williams USA: Wyoming T. A. Williams 2302 1897
GH: 02579170 Podagrostis humilis (Vasey) Björkman USA: Wyoming Tensleep Lakes T. A. Williams 2952 1897
GH: 01815046 Sorghum bicolor (Linnaeus) Moench USA: District of Columbia [data not captured] T. A. Williams 115 1897-11-18
GH: 00017914 Stipa nelsonii Scribner USA: Wyoming Sheep Mountain T. A. Williams 2269 1897-7-2
GH: 00017906 Stipa williamsii Scribner USA: Wyoming Monument Spring T. A. Williams 2804 1894-8-3
Polygalaceae GH: 01970479 Polygala curtissii A. Gray USA: Maryland Takoma Park: [no additional data] T. A. Williams 1899-9-10
A: 01969549 Polygala nuttallii Torr. & A. Gray USA: Maryland Takoma Park: [no additional data] T. A. Williams 1899-7-16
Polygonaceae GH: 01851082 Eriogonum hookeri S. Watson USA: Wyoming Solon. Wyoming T. A. Williams 1897-7
GH: 01851450 Eriogonum lagopus Rydberg USA: Wyoming Solon T. A. Williams 1897-7
GH: 02364893 Persicaria coccinea (Muhlenberg ex Willdenow) Greene USA: South Dakota Vicinity of Brookings T. A. Williams 1896-7-9
GH: 02364889 Persicaria coccinea (Muhlenberg ex Willdenow) Greene USA: South Dakota Vicinity of Brookings T. A. Williams 1891-7-21
GH: 02362805 Persicaria punctata (Elliott) Small USA: District of Columbia [data not captured] T. A. Williams 1899-10
GH: 02361949 Polygonum aviculare depressum (R. Meissner) Arcangeli USA: South Dakota Brookings T. A. Williams 1894
GH: 02360249 Polygonum buxiforme Small USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1894-10-9
GH: 02360593 Polygonum douglasii Greene USA: South Dakota Iroquois T. A. Williams 1895-8-5
GH: 02360901 Polygonum latum Small ex Rydberg USA: Nebraska Elmwood. T. A. Williams 1890-6-9
GH: 02007500 Polygonum prolificum (Small) B. L. Robinson USA: Wyoming Green River T. A. Williams 1897-7-9
GH: 02007485 Polygonum prolificum (Small) B. L. Robinson USA: South Dakota Iroquois T. A. Williams 1895-8-5
GH: 02006480 Rumex altissimus Alph. Wood USA: Nebraska Weeping Water T. A. Williams 98 1890-6-17
GH: 02004305 Rumex triangulivalvis (Danser) K. H. Rechinger USA: South Dakota Sioux River T. A. Williams 1892-8-11
Polyporaceae FH: 00532498 Poria sp. USA: Nebraska [data not captured] T. A. Williams s.n. 1895-11
Porpidiaceae FH: 00474368 Porpidia crustulata (Acharius) Hertel & Knoph USA: Maryland [data not captured] T. A. Williams 1897-12-1
Potamogetonaceae GH: 01688992 Potamogeton nodosus Poiret USA: South Dakota Brookings (South Dakota): Vicinity of Brooki... T. A. Williams 1893-9-1
GH: 01734034 Stuckenia pectinata (Linnaeus) Börner USA: Nebraska Willow [?] Lakes, Fremont. T. A. Williams 1890-7-31
GH: 01734131 Stuckenia pectinata (Linnaeus) Börner USA: South Dakota Lake Campbell T. A. Williams 1893-7-4
GH: 01734133 Stuckenia pectinata (Linnaeus) Börner USA: South Dakota Bigstone T. A. Williams 1892-8-24
Primulaceae GH: 01918942 Lysimachia quadrifolia Linnaeus USA: Maryland Takoma Park: [no additional data] T. A. Williams 1898-6-25
Psoraceae FH: 00475097 Psora icterica (Montagne) Müller Arg. USA: Nebraska [data not captured] T. A. Williams 1896-1
Pucciniaceae FH: 00782117 Aecidium lysimachiae Schweinitz USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 2 1891-5
FH: 01006474 Puccinia asteris Duby USA: South Dakota Brookings T. A. Williams 1893-9
FH: 01006478 Puccinia asteris Duby USA: South Dakota Brookings T. A. Williams 1893-8-7
FH: 00981809 Puccinia asteris Duby USA: South Dakota Brookings T. A. Williams 1893-9-23
FH: 00981814 Puccinia asteris Duby USA: South Dakota Iriquois T. A. Williams 1895-8-7
FH: 00981816 Puccinia asteris Duby USA: South Dakota Brookings T. A. Williams 1893-9-23
FH: 00955035 Puccinia gentianae (F. Strauss) Link USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 3 1893
FH: 00955343 Puccinia graminis Persoon USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1893-8-7
FH: 00782117 Puccinia limosae Magnus USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 2 1891-5
FH: 00955343 Puccinia poculiformis (Jacquin) Wettstein USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1893-8-7
FH: 01129976 Puccinia polygoni-amphibii Persoon USA: Nebraska Ashland T. A. Williams 1890-10-10
FH: 01129976 Puccinia polygoni-amphibii persicariae (F. Strauss) Arthur USA: Nebraska Ashland T. A. Williams 1890-10-10
FH: 01004286 Puccinia pruni-spinosae Persoon USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1892-9-16
FH: 00951733 Puccinia tumidipes Peck USA: Nebraska Ashland T. A. Williams 1890-10
FH: 01004286 Tranzschelia pruni-spinosae (Persoon) Dietel USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1892-9-16
FH: 01004299 Tranzschelia pruni-spinosae (Persoon) Dietel USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1892-9-16
FH: 01004930 Uromyces astragali Saccardo USA: New Mexico Las Vegas: [no additional data] T. A. Williams 1900-6-2
FH: 00783299 Uromyces porosus (Peck) H. S. Jackson USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1894-5-24
FH: 01122306 Uromyces proeminens (de Candolle) Léveillé USA: Nebraska Weeping Water T. A. Williams 1890-8-17
FH: 01122302 Uromyces proeminens (de Candolle) Léveillé USA: Nebraska Weeping Water T. A. Williams 1890-8-17
FH: 00783458 Uromyces psoraleae Peck USA: Nebraska War Bonnet Canon T. A. Williams 1890-6-21
FH: 00783964 Uromyces spermacoces (Schweinitz) M. A. Curtis USA: District of Columbia Takoma Park T. A. Williams 1897-9-29
Ramalinaceae FH: 01141300 Platysma fendleri Nylander USA: Maryland [data not captured] T. A. Williams 1897-1
Ranunculaceae GH: 01706550 Anemone canadensis Linnaeus USA: South Dakota Brookings (South Dakota): Vicinity of Brooki... T. A. Williams 1894-6-20
GH: 01706637 Anemone caroliniana Walter USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1895-5-4
A: 01657609 Clematis virginiana Linnaeus USA: North Dakota Oaks T. A. Williams 1895-6-1
GH: 01658724 Delphinium carolinianum penardii (Huth) Warnock USA: South Dakota Brookings (South Dakota): Vicinity of Brooki... T. A. Williams 1895-6-29
GH: 01662155 Ranunculus abortivus Linnaeus USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1895-5-4
GH: 01663950 Ranunculus flabellaris Rafinesque USA: Nebraska Ashland T. A. Williams 82 1890-6-30
Rhamnaceae A: 01790212 Ceanothus thyrsiflorus Eschscholtz USA: South Dakota South of Eagle Nest on Butte T. A. Williams 142
A: 01790267 Ceanothus velutinus Douglas USA: Montana Bear Lodge Mts. T. A. Williams 1897-8-10
Rosaceae A: 01726559 Amelanchier alnifolia (Nuttall) Nuttall ex M. Roemer USA: South Dakota Rosebud: [no additional data] T. A. Williams
A: 01730378 Aronia arbutifolia (Linnaeus) Persoon USA: District of Columbia [data not captured] T. A. Williams 1898-5-2
GH: 01759020 Crataegus chrysocarpa Ashe USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1895-5-4
A: 00994786 Holodiscus discolor dumosus (Nuttall ex Hooker) Dippel USA: Wyoming Green River T. A. Williams 1897-7
A: 00994788 Holodiscus discolor dumosus (Nuttall ex Hooker) Dippel USA: Wyoming Green River T. A. Williams 1897-7-9
A: 01723447 Prunus pumila besseyi (L. H. Bailey) Waugh USA: South Dakota Brookings (South Dakota): Vicinity of Brooki... T. A. Williams 1894-6-9
A: 01723449 Prunus pumila besseyi (L. H. Bailey) Waugh USA: South Dakota Keya Paha River T. A. Williams 2
A: 01724453 Prunus serotina Ehrhart USA: Maryland Upper Marlboro T. A. Williams 1900-7-15
A: 01725411 Prunus virginiana Linnaeus USA: South Dakota Bigstone T. A. Williams 89 1894-8-13
A: 01725812 Prunus virginiana demissa (Nuttall) Torrey USA: South Dakota Bigstone T. A. Williams 1895-6-13
A: 01725813 Prunus virginiana demissa (Nuttall) Torrey USA: South Dakota Brookings (South Dakota): Vicinity of Brooki... T. A. Williams 1894-5-29
A: 01557140 Rosa acicularis sayi (Schweinitz) W. H. Lewis USA: South Dakota Sioux Falls T. A. Williams 1896-6-5
A: 01557978 Rosa blanda Aiton USA: South Dakota Brookings (South Dakota): Vicinity of Brooki... T. A. Williams 1894-6-23
A: 01557979 Rosa blanda Aiton USA: South Dakota Bigstone T. A. Williams 1895-6-13
A: 01557981 Rosa blanda Aiton USA: South Dakota Oakwood T. A. Williams 1892-7-4
A: 01602023 Rosa sp. USA: Wyoming North Fork, Clear Creek. Big Horn Mts. T. A. Williams 1898-8-18
A: 01601404 Rosa woodsii Lindley USA: South Dakota Lake Hendricks. T. A. Williams 1893-6-17
A: 01601471 Rosa woodsii Lindley USA: Wyoming Green River T. A. Williams 1897-7-9
A: 01601487 Rosa woodsii Lindley USA: Wyoming Devil's Tower Little Missouri Buttes. T. A. Williams 1897-8-12
A: 01701380 Rubus occidentalis Linnaeus USA: South Dakota Oakwood T. A. Williams 1892-6-4
A: 01701381 Rubus occidentalis Linnaeus USA: South Dakota Sioux Falls T. A. Williams 1896-6-5
A: 01701382 Rubus occidentalis Linnaeus USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 2982 1893
A: 01586328 Spiraea sp. Linnaeus USA: South Dakota Big Stone T. A. Williams 1894-8-13
A: 01586329 Spiraea sp. Linnaeus USA: South Dakota Vicinity of Brookings; Medary T. A. Williams 1893-7-4
Rubiaceae GH: 02138417 Galium mollugo Linnaeus USA: District of Columbia Washington: [data not captured] T. A. Williams 1898-5-24
GH: 02138611 Galium obtusum Bigelow USA: District of Columbia Washington: [data not captured] T. A. Williams 1898-5-24
GH: 02139146 Galium pilosum puncticulosum (Michaux) Torr. & A. Gray USA: Maryland Takoma Park: [data not captured] T. A. Williams 1900-8-1
GH: 02140777 Galium sp. USA: South Dakota Elmwood T. A. Williams 1890-6-9
GH: 02140365 Galium triflorum Michaux USA: Nebraska Elmwood T. A. Williams 1890-6-9
Rutaceae GH: 01584810 Zanthoxylum americanum Miller USA: Nebraska Ashland T. A. Williams 176 1890-5-5
A: 01584865 Zanthoxylum americanum Miller USA: South Dakota Cobb's Creek T. A. Williams 41 1894-8-9
Saxifragaceae GH: 01735810 Heuchera richardsonii hispidior Rosendahl, Butters & Lakela USA: South Dakota S.W. Corner of Clark Co. T. A. Williams 1896-6-4
A: 01633317 Ribes americanum Miller USA: Nebraska War Bonnet Cañon T. A. Williams 64 1890-6-20
A: 01633367 Ribes americanum Miller USA: South Dakota Big Stone Lake T. A. Williams 166 1894-8-15
A: 01633373 Ribes americanum Miller USA: South Dakota Sioux River T. A. Williams 1895-5-11
A: 01633405 Ribes americanum Miller USA: Wyoming Devil's Tower, Little Missouri Buttes T. A. Williams 1897-8-12
GH: 01887196 Ribes missouriense Nuttall USA: South Dakota Brookings (South Dakota): [no additional dat... T. A. Williams 1895-5-4
A: 01887510 Ribes odoratum H. Wendland USA: South Dakota Lower White River T. A. Williams
A: 01626546 Ribes sp. USA: South Dakota Sioux River T. A. Williams 1895-5-11
Scrophulariaceae GH: 01843248 Mimulus ringens Linnaeus USA: South Dakota Brookings T. A. Williams 1894-7
Solanaceae GH: 01543398 Solanum rostratum Dunal USA: Nebraska Ashland T. A. Williams 5 1890-7-30
GH: 01543609 Solanum triflorum Nuttall USA: Wyoming Wind River T. A. Williams
Thelephoraceae FH: 00528787 Stereum fasciatum (Schweinitz) Fries: Fries USA: Nebraska [data not captured] T. A. Williams 1059 1895-12-24
Trapeliaceae FH: 00454293 Placynthiella icmalea (Acharius) Coppins & P. James USA: Maryland Takoma Park: [no additional data] T. A. Williams 1900-4-2
FH: 00473581 Placynthiella uliginosa (Schrader) Coppins & P. James USA: District of Columbia [data not captured] T. A. Williams 1897-5
FH: 00473585 Placynthiella uliginosa (Schrader) Coppins & P. James USA: District of Columbia [data not captured] T. A. Williams 1897-5
FH: 00491602 Trapelia coarctata (Turner ex Smith) M. Choisy USA: District of Columbia [data not captured] T. A. Williams 1898-1
FH: 00491603 Trapelia coarctata (Turner ex Smith) M. Choisy USA: District of Columbia [data not captured] T. A. Williams 1898-1
Umbilicariaceae FH: 00455857 Omphalodiscus virginis (Schrader) Scholander USA: Wyoming [data not captured] T. A. Williams 1897-8
Usneaceae FH: 00476552 Ramalina americana Hale USA: District of Columbia [data not captured] T. A. Williams 1898-5
Verbenaceae GH: 01954750 Verbena bracteata Lagasca & Rodriguez USA: South Dakota [no additional data] T. A. Williams 348
Verrucariaceae FH: 00473501 Placidium arboreum (Schweinitz ex E. Michener) Lendemer USA: Maryland [data not captured] T. A. Williams 1898-5
FH: 00473502 Placidium arboreum (Schweinitz ex E. Michener) Lendemer USA: Maryland [data not captured] T. A. Williams 1898-5
FH: 00473501 Placidium tuckermanii (Ravenel ex Montagne) Breuss USA: Maryland [data not captured] T. A. Williams 1898-5
FH: 00473502 Placidium tuckermanii (Ravenel ex Montagne) Breuss USA: Maryland [data not captured] T. A. Williams 1898-5
FH: 00479242 Willeya diffractella (Nylander) Müller Arg. USA: Nebraska [data not captured] T. A. Williams 1895-11-30
FH: 00479243 Willeya diffractella (Nylander) Müller Arg. USA: Nebraska [data not captured] T. A. Williams 1895-11
FH: 00479244 Willeya diffractella (Nylander) Müller Arg. USA: Nebraska [data not captured] T. A. Williams 1895-11
FH: 00479245 Willeya diffractella (Nylander) Müller Arg. USA: Nebraska [data not captured] T. A. Williams 1895-11
Violaceae GH: 02145837 Viola canadensis Linnaeus USA: South Dakota Big Stone Lake T. A. Williams 1895-6-14
Vitaceae A: 01578160 Vitis aestivalis Michaux USA: Maryland Takoma Park: [no additional data] T. A. Williams 1900-9-9
A: 01579835 Vitis riparia Michaux USA: South Dakota Sioux Falls T. A. Williams 1896-6-5
A: 01580592 Vitis vulpina Linnaeus USA: South Dakota Big Stone T. A. Williams 156 1894-8-14
