Synonyms
Machaeranthera tanacetifolia var. pygmaea A.Gray
Aster parvulus S.F.Blake
Arida parviflora (A.Gray) D.R.Morgan & R.L.Hartm.
Aster tanacetifolius var. pygmaeus A.Gray
Machaeranthera pygmaea (A.Gray) Wooton & Standl.
Machaeranthera parviflora A.Gray