[Wikipedia] Range, Habitat: Prosartes smithii is a North American species of flowering plants known by the common name largeflower fairybells. It is native to western North America from Vancouver Island in British Columbia south as far as Monterey County in California. It grows in shady forest and woodland, including redwood forests (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: 03/30/2025).