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Rigid Hornwort

A quick growing plant that can clog up a pond quite quickly.



Common Name Rigid Hornwort
Scientific Name Ceratophyllum demersum
Species Group Aquatic Plants
Interest Level
Look for
Identification Notes
Primary Habitat
Family Hornwort family - Ceratophyllaceae
Status Scarce
Flower Colour Group Green
  • 07 - July
  • 08 - August
  • 09 - September
Preferred Environment
Look for Masses of green spikes appearing above the water surface
Additional Identification Notes
Similar Species

The records for this species have been organised into reports, charts, maps and photos. Click a pic below to see the detail:

Notebook Distribution Map Sites List Some Charts Some Photographs Recent Records Guidance Notes

To see related species click here: 

Aquatic Plants