Fabaceae
PsorothamnusPsorothamnus arborescens (Torr. ex A.Gray) Barneby
Psorothamnus arborescens var. arborescens
Psorothamnus arborescens var. minutifolius (Parish) Barneby
Psorothamnus arborescens var. pubescens (Parish) Barneby
Psorothamnus arborescens var. simplifolius (Parish) Barneby
Psorothamnus dentatus Rydb.
Psorothamnus emoryi (A.Gray) Rydb.
Psorothamnus emoryi (A.Gray) Rydb. var. emoryi
Psorothamnus emoryi var. arenarius (Brandegee) Barneby
Psorothamnus fremontii (Torr. ex A.Gray) Barneby
Psorothamnus fremontii (Torr. ex A.Gray) Barneby var. fremontii
Psorothamnus fremontii var. attenuatus Barneby
Psorothamnus junceus Rydb.
Psorothamnus kingii (S.Watson) Barneby
Psorothamnus polydenius (Torr. ex S.Watson) Rydb.
Psorothamnus polydenius (Torr. ex S.Watson) Rydb. var. polydenius
Psorothamnus polydenius var. jonesii Barneby
Psorothamnus schottii (Torr.) Barneby
Psorothamnus scoparius (A.Gray) Rydb.
Psorothamnus spinosus (A.Gray) Barneby
Psorothamnus thompsonae (Vail) S.L.Welsh & N.D.Atwood
Psorothamnus thompsonae (Vail) S.L.Welsh & N.D.Atwood var. thompsonae
Psorothamnus thompsonae var. whitingii (Kearney & Peebles) Barneby