[deadasthedodo.com] Historical range, Presumed extinct: The Santa Catalina Monkeyflower is apparently known exclusively from the type material that was collected in 1901 or 1904 (depending on the source); the species was restricted to Santa Catalina Island in the Channel Islands group offshore the Pacific coast of California, USA.
The species presumably disappeared due to grazing by introduced ungulates and is now considered extinct. (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]. 2024. Berkeley, California:The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 11/21/2024).