[Wikipedia] Range, Identification Issue: Brickellia longifolia, the longleaf brickellbush, is a shrub in the family Asteraceae. It is found in the Colorado Plateau and Canyonlands region of the southwestern United States, in Arizona, Utah, Nevada, and western Colorado.[2]:?139?[3]
Some authors consider the closely related Mojave Desert plants as a variety of B. longifolia[4][5] but others recognize it as a distinct species, B. multiflora. (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: 04/01/2025).