[burkeherbarium.org] Range: Occurring on both sides of the Cascades crest in Washington; southwestern British Columbia to Baja California, east to the Rocky Mountains and Texas. (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: 04/18/2025).
