[Wikipedia] Eurasia, North America native, Description: Echinochloa muricata is a species of grass known by the common names rough barnyard grass and American barnyard grass. It is native to Eurasia and much of North America.[1][2]
It is an annual grass growing one half to one meter in height. (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: 03/30/2025).
