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Lemanea is the generic name for an alga of which occurs in the British Isles.
There are two species in the British Isles:-
Lemanea is a freshwater alga, a species in the Phylum Rhodophyta (Red Algae) of the Order Batrachospermales. Both species are considered to be widespread in the northern hemisphere. Although placed in the Rhodophyta (Red algae) it in fact is green in colour.
Additional recommended knowledge
Lemanea is a stiff bristle-like branched or unbranched plant similar to a coarse horsehair. Close inspection show it to have small swellings at more or less regular intervals along its length. It grows to 10 cm in length, in bunches in freshwater. It is blue-green to olive in colour when young.
The genus is considered to be cosmopolitan in the northern hemisphere.
The records of this genus in Ireland are few with only three historic records from the north of Ireland in the Ulster Museum Herbarium (BEL). One collected by William Thompson in 1839; one collected by W. Sawers in 1856 and one collected in 1884 by H.W.Lett. These seem to be the earliest records from the north of Ireland. A more recent specimen collected in 1959 by Miss M.P.H. Kertland near Dungiven, Co. Londonderry is also preserved. A further 16 specimens collected recently, that is within the last 50 years, have been added to the collection - all from Northern Ireland. We have one foreign specimen collected recently from the Faroes.
In North America four species in this genus are listed. 
World-wide 10 species are listed in algaebase:- 
'A Lemanea species was found on slabs in the rapidly flowing streams in the NW of the Island' (Hibberd, D.J. in The Island of Mull a survey of its flora and environment. Ed A.C. Jermy and J.A. Crabbe. British Museum (Natural History) London. 1978).
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Lemanea". A list of authors is available in Wikipedia.|