Synonyms
Ptilonella laevis Greene
Blepharipappus scaber var. subcalvus A.Gray
Blepharipappus laevis A.Gray
Blepharipappus scaber var. laevis A.Gray
Blepharipappus scaber subsp. laevis (A.Gray) D.D.Keck
Ptilonella scabra Nutt.
Ptilonella scabra var. subcalva Greene