[10000thingsofthepnw.com] Common Name Meaning: This rather spectacular member of the phlox family (Polemoniaceae) also goes by the names of western sky-pilot, western polemonium, and giant polemonium. The common name Jacob’s ladder refers to the supposed resemblance of the opposing, but slightly offset, leaflets to the biblical Jacob’s vision of a ladder to heaven. (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).