Calyptridium umbellatum var. caudiciferum (A. Gray) Jepson
Calyptridium umbellatum var. caudiciferum (A. Gray) Jepson is a synonym sensu FNA Ed. Comm., 2003a of:
Cistanthe umbellata (Torrey) Hershkovitz, an accepted species name sensu FNA Ed. Comm., 2003a.