Synonyms
Haplopappus inuloides var. linearis (D.D.Keck) B.Boivin
Haplopappus inuloides var. howellii (A.Gray) B.Boivin
Haplopappus howellii A.Gray
Haplopappus uniflorus var. howellii (A.Gray) M.Peck
Pyrrocoma linearis (D.D.Keck) Kartesz & Gandhi
Haplopappus uniflorus subsp. linearis D.D.Keck
Haplopappus uniflorus subsp. howellii (A.Gray) H.M.Hall