Synonyms
Actinella richardsonii var. canescens D.C.Eaton
Hymenoxys cooperi subsp. grayi Cockerell
Hymenoxys cooperi var. argyrea Cockerell
Actinella cooperi A.Gray
Picradenia canescens Greene
Picradenia cooperi Greene
Actinea cooperi Kuntze
Hymenoxys cooperi var. canescens (D.C.Eaton ex S.Watson) K.F.Parker
Hymenoxys canescens Cockerell
Actinea canescens S.F.Blake