[Wikipedia] Ecology: Sedum lanceolatum is the host plant of the butterfly species Parnassius smintheus. The plant produces a deterrent cyanoglycoside, Sarmentosin, so that herbivores do not feed on it. This butterfly's larvae sequester sarmentosin from the plant for their own defense. (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).
