[Wikipedia] Medicinal Uses: Various species of the genus Hypericum have been used since ancient times as herbal remedies. This species has been used traditionally to reduce muscle spasms and for the treatment of asthma. (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).