Spermatophyta: Dicotyledonae: Archichlamydeae: Ceratophyllales

Ceratophyllaceae - Hornwort family

Wilmot-Dear, C.M. (1991) Ceratophyllaceae Flora Zambesiaca 9(6)

Description of the family

Submerged, aquatic, monoecious herbs without roots. Stipules 0. Leaves in whorls, filiform, regularly forked into linear segments, often rigid or brittle, with spiny teeth on the margin; apical segments truncate, 2-spined at the apex with a reddish glandular projection between the spines (basal segments sometimes parasitised and becoming swollen and sac-like).Flowers actinomorphic, hypogynous, axillary, 1-several at each node; male and female flowers at separate nodes, ± sessile. Perianth lobes 6-13, united at base; margin often with a single lateral spine or ± lacerate; apex as leaf apex. Male flowers with numerous stamens. Female flowers: staminodes 0; ovary superior, tapering into a long style; ovule 1. Fruit a nut.

Worldwide: 1 genus and 2-6 species, cosmopolitan.

Zimbabwe: 1 genus and 1 taxon.

Ceratophyllum demersum var. demersum

Links to genera:     View: living plant images - herbarium specimen images - all images for this family

Ceratophyllum L.Description, Image

Other sources of information about Ceratophyllaceae:

Our websites:

Flora of Botswana: Ceratophyllaceae
Flora of Caprivi: Ceratophyllaceae
Flora of Malawi: Ceratophyllaceae
Flora of Mozambique: Ceratophyllaceae
Flora of Zambia: Ceratophyllaceae

External websites:

Google: Web - Images - ScholarGRIN (Germplasm Resources Information Network) taxonomy for plants report for Ceratophyllaceae

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-20

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2020). Flora of Zimbabwe: Family page: Ceratophyllaceae.
https://www.zimbabweflora.co.zw/speciesdata/family.php?family_id=54, retrieved 19 September 2020

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