Erysimum ammophilum is a perennial herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
[Wikipedia] California Endemic, Habitat, Range: It is endemic to California, where it is an uncommon beach-dwelling wildflower. It is known from dunes and bluffs near Monterey Bay, the coastline of San Diego County, and parts of the Channel Islands. (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: 03/29/2025).
one or more occurrences