[Wikipedia] Taxonomy: Based on plastid DNA sequence analysis, Myriopteris newberryi is a nearly basal member of Myriopteris clade C (covillei clade) and is relatively distantly related to other Myriopteris species. (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).