[Wikipedia] Indigenous Peoples Food, Taxonomy: The young fronds are edible after cooking; Native Americans cook both the fiddleheads and the rhizomes. The Finnish name for this plant is hiirenporras, literally meaning "mouse's stair". (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).