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RIGID HORNWORT Ceratophyllum demersum (Ceratophyllaceae) Aquatic. Submerged perennial with rather brittle stems; by late summer these acquire a coating of chalk and silt (as do the leaves to a lesser extent). FLOWERS are minute and borne at leaf nodes (Jul-Sep). FRUITS are warty and beaked, with 2 basal spines. LEAVES are rigid, toothed and fork 2-3 times; in whorls. STATUS-Locally common only in England.
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RIGID HORNWORT Ceratophyllum demersum (Ceratophyllaceae) Aquatic. Submerged perennial with rather brittle stems; by late summer these acquire a coating of chalk and silt (as do the leaves to a lesser extent). FLOWERS are minute and borne at leaf nodes (Jul-Sep). FRUITS are warty and beaked, with 2 basal spines. LEAVES are rigid, toothed and fork 2-3 times; in whorls. STATUS-Locally common only in England.

Filename: 130568.jpg
Size: 2000x3008 / 3.1MB
Source:
Date: 1 Jul 2013
Location:
Credit: PAUL STERRY/NPL
Copyright:
Model Release: No
Property Release: No
Restrictions: Nature Photographers Ltd., West Wit, New Road, Little London, Tadley, Hampshire, RG26 5EU. Tel: +44(0)1256 850661 web: www.naturephotographers.co.uk
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