Gaillardia acaulis Pursh
Actinea incana A.Nelson
Leptopoda acaulis DC.
Picradenia acaulis Britton
Actinella depressa var. pygmaea A.Gray
Actinea depressa var. pygmaea J.F.Macbr.
Actinella eradiata A.Nelson
Cephalophora acaulis DC.
Actinea simplex A.Nelson
Actinea acaulis Spreng.
Actinea formosa A.Nelson
Actinea eradiata A.Nelson
Ptilepida acaulis (Pursh) Britton
Actinella simplex A.Nelson
Tetraneuris eradiata A.Nelson
Tetraneuris pygmaea Wooton & Standl.
Actinella leptoclada A.Gray
Hymenoxys acaulis (Pursh) K.F.Parker
Tetraneuris incana A.Nelson
Tetraneuris simplex A.Nelson
Tetraneuris septentrionalis Rydb.
Actinella incana A.Nelson
Actinella acaulis (Pursh) Nutt.
Actinea acaulis var. simplex J.F.Macbr.
Actinella lanata Nutt.
Actinea acaulis var. lanigera S.F.Blake
Actinea acaulis var. lanata J.F.Macbr.
Actinea acaulis var. septentrionalis A.Nelson
Actinea osterhoutii A.Nelson