Baccharis arizonica Eastw. accepted as Baccharis sarothroides A.Gray (original description)
Erigeron crenatus Eastw. (original description)
Erigeron kuschei Eastw. (original description)
Eriophyllum rixfordii Eastw. accepted as Eriophyllum lanatum var. lanceolatum (Howell) Jeps. (original description)
Eucephalus bicolor Eastw. accepted as Eucephalus tomentellus (Greene) Greene (original description)
Eucephalus glandulosus Eastw. accepted as Eucephalus glabratus (Greene) Greene (original description)
Eupatorium pacificum B.L.Rob. accepted as Ageratina pacifica R.M.King & H.Rob. (original description)
Haplopappus traskae Eastw. (original description)
Hieracium occidentale Eastw. (original description)
Laphamia arizonica Eastw. (original description)