Alismataceae GH: 01080485 Sagittaria filiformis J. G. Smith USA: Massachusetts Tewksbury: Tewksbury, Shawsheen River F. C. Seymour 15231 1953-6-17
Cyperaceae GH: 02392207 Carex brunnescens (Persoon) Poiret USA: Wisconsin [data not captured] F. C. Seymour 15262 1953-7-5
GH: 02392205 Carex brunnescens (Persoon) Poiret USA: Wisconsin [data not captured] F. C. Seymour 15263 1953-7-5
GH: 02369334 Carex praegracilis W. Boott USA: Wisconsin [data not captured] F. C. Seymour 15,439 1953-7-29
GH: 02369333 Carex praegracilis W. Boott USA: Wisconsin [data not captured] F. C. Seymour 15,439 1953-7-29
GH: 02394847 Carex trisperma Dewey USA: Wisconsin [data not captured] F. C. Seymour 15284 1953-7-7
Eriocaulaceae NEBC: 00855363 Eriocaulon aquaticum (Hill) Druce USA: Massachusetts Douglas: Douglas F. C. Seymour 1953-9-27
Fabaceae GH: 02342078 Trifolium arvense Linnaeus USA: Wisconsin [data not captured] F. C. Seymour 15500 1953-8-13
Iridaceae NEBC: 01044211 Sisyrinchium angustifolium Miller USA: Massachusetts Charlton: Charlton F. C. Seymour 1953-6-14
Juncaceae GH: 01026496 Juncus acuminatus Michaux USA: Massachusetts Dighton: Dighton F. C. Seymour 15578 1953-9-23
GH: 02397276 Juncus anthelatus (Wiegand) R. E. Brooks USA: Wisconsin [data not captured] F. C. Seymour 15,520 1953-8-16
GH: 01045092 Juncus canadensis J. Gay ex Laharpe USA: Massachusetts Dighton: Dighton F. C. Seymour 15570 1953-9-23
GH: 02401452 Juncus filiformis Linnaeus USA: Wisconsin [data not captured] F. C. Seymour 15, 528 1953-8-16
Lentibulariaceae GH: 01975913 Utricularia purpurea Walter USA: Wisconsin Bass Lake, T35N, R7E, sec.34. F. C. Seymour 16475 1953-8-20
Poaceae GH: 00855902 Muhlenbergia schreberi J. F. Gmelin USA: Massachusetts Taunton: Taunton F. C. Seymour 15594 1953-10-22
Potamogetonaceae GH: 00449337 Potamogeton alpinus subellipticus (Fernald) Ogden USA: Wisconsin [data not captured] F. C. Seymour 15,376 1953-7-13
GH: 01564122 Potamogeton bicupulatus Fernald USA: Wisconsin [data not captured] F. C. Seymour 15,427 1953-7-20
GH: 00606110 Potamogeton crispus Linnaeus USA: Massachusetts Concord: Concord, Sudbury River F. C. Seymour 15236 1953-6-19
Ranunculaceae GH: 01015858 Ranunculus flabellaris Rafinesque USA: Massachusetts Tewksbury: Tewksbury, Shawsheen River F. C. Seymour 15234 1953-6-17
Rubiaceae NEBC: 00732064 Galium lanceolatum (Torrey) Torrey USA: Massachusetts Sturbridge: Sturbridge F. C. Seymour 29418 1953-6-10
Salicaceae NEBC: 00769292 Salix humilis Marshall USA: Massachusetts Petersham: Petersham F. C. Seymour 28317 1953-4-12
