[Wikipedia[ Native to Eurasia: Rostraria cristata, the Mediterranean hairgrass,[1] is an annual grass species which is native to Eurasia and widely naturalised throughout central and eastern Australia.[2][3]
(Note: Rostraria cristata is an alternate name for Koeleria gerardi per Calflora) (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).