Piperia yadonii is a perennial herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.1 (rare, threatened, or endangered in CA and elsewhere).
Federal status: Endangered.
[elkhornsloughctp.org] Habitat: Habitat
Confined to three habitats: 1) maritime chaparral, with Hookers manzanita (Arctostaphylos hookeri ssp. hookeri); 2) Monterey pine (Pinus radiata) forest, sometimes with Gowen cypress (Hesperocyparis goveniana); 3) Monterey cypress (Hesperocyparis macrocarpa) forest. The populations in woodland communities occur under partial canopy cover in an open mostly herbaceous understory (Morgan and Ackerman 1990). (link added by Mary Ann Machi)
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2025.The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 03/28/2025).
one or more occurrences