[Wikipedia] Aquatic, Range, Aquarium Plant: Ceratophyllum demersum, commonly known as hornwort, rigid hornwort,[1] coontail, or coon's tail,[2] is a species of Ceratophyllum. It is a submerged, free-floating aquatic plant, with a cosmopolitan distribution, native to all continents except Antarctica. It is a harmful weed introduced in New Zealand.[2] It is also a popular aquarium plant. (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: 03/28/2025).
