Achillea californica Pollard accepted as Achillea millefolium L. (original description)
Achillea gigantea Pollard accepted as Achillea millefolium L. (original description)
Achillea pecten-veneris Pollard accepted as Achillea millefolium L. (original description)
Antennaria angustifolia Rydb. accepted as Antennaria rosea subsp. confinis (Greene) R.J.Bayer (original description)
Artemisia natronensis A.Nelson accepted as Artemisia longifolia Nutt. (original description)
Bidens comosa var. acuta Jeps. (original description)
Bidens elliptica Wiegand (original description)
Bidens frondosa var. puberula Wiegand accepted as Bidens vulgata Greene (original description)
Bidens melanocarpa var. pallida Wiegand accepted as Bidens frondosa L. (original description)
Crepis atribarba A.Heller (original description)
Crepis riparia A.Nelson accepted as Crepis runcinata subsp. hispidulosa (Howell ex Rydb.) Babc. & Stebbins (original description)
Erigeron engelmannii A.Nelson (original description)
Erigeron flabellifolius Rydb. (original description)
Erigeron inamoenus A.Nelson accepted as Erigeron radicatus Hook. (original description)
Erigeron macdougalii A.Heller accepted as Lachnophyllum noeanum Boiss. (original description)
Erigeron melanocephalus (A.Nelson) A.Nelson (original description)
Erigeron pinnatisectus (A.Gray) A.Nelson (original description)
Erigeron spathulifolius Rydb. accepted as Erigeron leiomerus A.Gray (original description)
Erigeron wyomingensis A.Nelson accepted as Erigeron concinnus var. condensatus D.C.Eaton (original description)
Gnaphalium angustifolium A.Nelson accepted as Gnaphalium exilifolium A.Nelson (original description)
Grindelia brownii A.Heller accepted as Grindelia hirsutula Hook. & Arn. (original description)
Grindelia erecta A.Nelson accepted as Grindelia subalpina Greene (original description)
Grindelia perennis A.Nelson accepted as Grindelia hirsutula Hook. & Arn. (original description)
Guardiola angustifolia (A.Gray ex A.Gray) B.L.Rob. (original description)
Guardiola arguta B.L.Rob. (original description)
Guardiola carinata B.L.Rob. (original description)
Guardiola odontophylla B.L.Rob. (original description)
Guardiola rosei B.L.Rob. (original description)
Senecio nelsonii Rydb. accepted as Packera fendleri (A.Gray) W.A.Weber & Á.Löve (original description)
Senecio nelsonii var. uintahensis A.Nelson accepted as Packera multilobata (Torr. & A.Gray ex A.Gray) W.A.Weber & Á.Löve (original description)
Solidago pallescens C.Mohr accepted as Solidago brachyphylla Chapm. ex Torr. & A.Gray (original description)