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| Ceramium | ||||||||||||
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 Ceramium gracillimum var. byssoideum 100 µm basal part showing rhizoids (arrow)
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Ceramium is a genus of red algae in the Rhodophyta. It is a large genus with at least 15 species in the British Isles. [1]
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Description
All species of Ceramium are small algae growing to no more than 30 cm (12 in) in length. They consist of a terete axis of cells surrounded by smaller cells forming a cortex. In most species this a continuous cortex enclosing the axis, in others the cortical cells are arranged only in nodes at the junction of cells of the axes.[1]Species in the genus show irregular branching and are attached by unicellular or branched rhizoids.
Reproduction
The species is dioecious forming spermatangia and carpogonia. The fertilized carpogonium develops growing parasitically attached to the female plant. Tetraspores are born in the cortical bands.[1]
References
- ^ a b c Maggs, C.A. and Hommersand, M.H. 1993. Seaweeds of the British Isles. vol.1, Rhodophyta Part 3A Ceramiales. HMSO & Natural History Museum, London. ISBN 0 11 310045 0
External links
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