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• Ceratophyllum demersum L. - Rigid Hornwort - Ceratophyllaceae

© Ralph Forbes

© Ralph Forbes

© Alan Hill

(Map updated: March 2008)

The commoner of the two hornworts in Northern Ireland. A submerged aquatic plant of lakes and drains, unevenly distributed about the Province, with one particular stonghold in Co. Down.

All names: Ceratophyllum demersum L.