[Wikipedia] Monotypic Genus, Etymology: Lunularia is a genus of liverworts whose only species is Lunularia cruciata, the crescent-cup liverwort.[1] Lunularia is either the only genus in the order Lunulariales,[2] or may be placed in the order Marchantiales.[3][4][5] The name, from Latin luna, moon, refers to the moon-shaped gemma cups. (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: 05/09/2025).