Artemisia ludoviciana var. latifolia (Besser) Torr. & A.Gray accepted as Artemisia ludoviciana subsp. ludoviciana Nutt. (original description)
Aster salsuginosus var. scaposus Torr. & A.Gray (original description)
Helianthus occidentalis var. dowellianus (M.A.Curtis) Torr. & A.Gray accepted as Helianthus occidentalis subsp. occidentalis Riddell (original description)
Krigia sect. Cymbia Torr. & A.Gray (original description)
Lactuca elongata var. integrifolia (Bigelow) Torr. & A.Gray accepted as Lactuca tatarica (L.) C.A.Mey. (original description)
Lactuca elongata var. longifolia (Michx.) Torr. & A.Gray accepted as Lactuca canadensis L. (original description)
Lactuca elongata var. sanguinea (Bigelow) Torr. & A.Gray accepted as Lactuca hirsuta Muhl. ex Nutt. (original description)
Microrhynchus laciniatus var. longiflorus (Nutt.) Torr. & A.Gray (original description)
Senecio aureus var. lanceolatus Oakes ex Torr. & A.Gray accepted as Packera schweinitziana (Nutt.) W.A.Weber & Á.Löve (original description)
Taraxacum hirsutum (Hook.) Torr. & A.Gray accepted as Agoseris hirsuta (Hook.) Greene (original description)