Potamogeton pusillus, a monocot, is a perennial herb (aquatic) that is native to California and and is also found elsewhere in North America and beyond.
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals,
including the
Consortium of California Herbaria.[web application]. 2021. Berkeley, California:The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: Jan 20, 2021).