Achillea arenicola A.Heller accepted as Achillea millefolium L. (original description)
Agoseris leptocarpa Osterh. accepted as Agoseris parviflora (Nutt.) D.Dietr. (original description)
Anaphalis occidentalis (Greene) A.Heller (original description)
Anaphalis sierrae A.Heller accepted as Anaphalis margaritacea (L.) Benth. & Hook.f. (original description)
Antennaria plantaginifolia var. petiolata (Fernald) A.Heller accepted as Antennaria plantaginifolia (L.) Richardson (original description)
Arnica grayi A.Heller accepted as Arnica discoidea Benth. (original description)
Artemisia monocephala (A.Gray) A.Heller accepted as Artemisia pattersonii A.Gray (original description)
Brauneria angustifolia (DC.) A.Heller (original description)
Carduus bipinnatus (Eastw.) A.Heller accepted as Cirsium calcareum (M.E.Jones) Wooton & Standl. (original description)
Carduus calcareus (M.E.Jones) A.Heller accepted as Cirsium calcareum (M.E.Jones) Wooton & Standl. (original description)
Carduus ciliolatus (L.F.Hend.) A.Heller accepted as Cirsium ciliolatum (L.F.Hend.) J.T.Howell (original description)
Carduus clavatus (M.E.Jones) A.Heller accepted as Cirsium clavatum (M.E.Jones) Petr. (original description)
Carduus diffusus (Eastw.) A.Heller accepted as Cirsium calcareum (M.E.Jones) Wooton & Standl. (original description)
Carduus hesperius A.Heller accepted as Cirsium eatonii var. hesperium (Eastw.) D.J.Keil (original description)
Carduus laterifolius Osterh. accepted as Cirsium scariosum var. americanum (A.Gray) D.J.Keil (original description)
Carduus nidulus A.Heller accepted as Cirsium arizonicum var. arizonicum (A.Gray) Petr. (original description)
Carduus tioganus (Congdon) A.Heller accepted as Cirsium scariosum var. americanum (A.Gray) D.J.Keil (original description)
Carduus vaseyi (A.Gray) A.Heller accepted as Cirsium hydrophilum var. vaseyi (A.Gray) J.T.Howell (original description)
Chrysothamnus appendiculatus (Eastw.) A.Heller accepted as Ericameria nauseosa var. latisquamea (A.Gray) G.L.Nesom & G.I.Baird (original description)
Crepis exilis Osterh. accepted as Crepis atribarba A.Heller (original description)
Erigeron cascadensis A.Heller (original description)
Erigeron paucipetalus Osterh. (original description)
Gaertneria bipinnatifida var. dubia A.Heller accepted as Ambrosia chamissonis (Less.) Greene (original description)
Gaertneria chamissonis var. viscida A.Heller accepted as Ambrosia chamissonis (Less.) Greene (original description)
Gnaphalium albatum Osterh. accepted as Pseudognaphalium canescens (DC.) Anderb. (original description)
Isocoma hirtella (A.Gray) A.Heller accepted as Isocoma pluriflora (Torr. & A.Gray) Greene (original description)
Lacinaria helleri (Porter) Porter accepted as Liatris helleri (Porter) Porter (original description)
Lacinaria helleri (Porter) Porter ex A.Heller accepted as Liatris helleri (Porter) Porter (original description)
Lacinaria pilosa (Aiton) A.Heller accepted as Liatris pilosa (Aiton) Willd. (original description)
Nabalus barbatus (Torr. & A.Gray) A.Heller (original description)
Nabalus hastatus (Less.) A.Heller accepted as Nabalus alatus Hook. (original description)
Nabalus mainensis (A.Gray) A.Heller (original description)
Ptilocalais tenuifolia Osterh. accepted as Microseris nutans (Hook.) Sch.Bip. (original description)
Ptiloria lygodesmoides (M.E.Jones ex L.F.Hend.) A.Heller accepted as Stephanomeria pauciflora (Torr.) A.Nelson (original description)
Pyrrocoma insecticruris (L.F.Hend.) A.Heller (original description)
Senecio majus A.Heller (original description)
Senecio pagosanus A.Heller accepted as Senecio amplectens var. amplectens A.Gray (original description)
Solidago vaseyi A.Heller (original description)
Sphaeromeria potentilloides (A.Gray) A.Heller (original description)
Sphaeromeria simplex (A.Nelson) A.Heller (original description)
Stenotus laceratus A.Heller (original description)
Verbesina aristata A.Heller (original description)
Xylorhiza venusta (M.E.Jones) A.Heller (original description)