COVID-19 Advice for the JCU Community - Last updated: 15 October 2021, 8am (AEST)

Ceratophyllum demersum

(Hornwort)

FAMILY

Ceratophyllaceae

Species

Ceratophyllum demersum

Common name(s)

Hornwort

Flower colour; life form

Flowers greenish. Herb, free-floating or loosely rooted

Distinguishing features

Leaves whorled 1.5 – 3.5 cm long, much-branched with numerous thin segments, usually with conspicuous teeth on margin. Male and female flowers – inconspicuous. Fruit a hard achene with a terminal spine, basal spines and marginal wings may also be present.

Ceratophyllum demersum