Burbank's Experimental Farm: Luther Burbank considered these as a possible commercial product. They are still growing on the farm:
#28 Oso Berry ( Oemleria cerasiformis ) Burbank selection (1918) of a hardy, deciduous, drought-tolerant native shrub. Bears bean-sized, edible, blue-black fruit.
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).
