[Wikipedia] Taxonomy: Penstemon clevelandii was scientifically described and named by Asa Gray in 1876. It has three recognized varieties.[2]
Its specific epithet, clevelandii, honors the 19th-century San Diego plant collector and lawyer Daniel Cleveland. (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).