Killi
ENCYCLOQUARIA . SCIENCE
The Art and Science of Aquaria
Ceratophyllum
Ceratophyllum


demersum

Rigid Hornwort or Common Hornwort

Cosmopolitan.

muricatum

Prickly Hornwort

Widespread in many places though not all countries

platyacanthum

Scattered locations in Germany, Hungary, France, Russia, China, Japan, Korea

submersum

Soft Hornwort or Tropical Hornwort

Europe, Central Asia, northern Africa, scattered places in tropical Africa, Turkey, Oman, Florida, Dominican Republic

tanaiticum

Endemic to Hungary and eastern Europe.