[nathistoc.bio.uci.edu] Habitat, Name Origin: Habitat: Common in +/- shaded and vernally moist places below 5000 ft.; Coastal Sage Scrub, Chaparral, S. Oak Wood, etc.; Lower California to British Columbia., inland to desert edge. Blooms Feb.-May. Name: Named for John Clayton, 18th century American botanist born 1686. Greek, per, to bore through. Latin, folium, a leaf. (Jaeger 188, 104). The name describes the connate leaves, which appear to have a stem growing through them. (my comment). Mexicana indicates that the subspecies was first identified in Mexico. (link added by Mary Ann Machi)