[Wikipedia] Range, Pollinators: It is known from scattered occurrences around Death Valley, and only one of the two varieties occurs on the Nevada side of the border. The mouth of the flower bears a stark, dark line on each of its three lower lobes, nectar guides for its pollinators which probably include native bumble bees. (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: 03/31/2025).