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Polysiphonia nigra (Huds.) Batt. et Antithamnion cruciatum (C. Ag.) Näg. var. defectum Halos (Rhodophyta-Ceramiales) nouvelles pour la flore du Boulonnais (Pas-de-Calais; France)
Coppejans, E. (1981). Polysiphonia nigra (Huds.) Batt. et Antithamnion cruciatum (C. Ag.) Näg. var. defectum Halos (Rhodophyta-Ceramiales) nouvelles pour la flore du Boulonnais (Pas-de-Calais; France). Dumortiera 21: 29-36
In: Dumortiera. Nationale Plantentuin van België = Jardin Botanique National de Belgique: Meise. ISSN 0251-1134; e-ISSN 2295-3728, more
During September 1981, male and female gametophytes and tetrasporophytes of Polysiphonia nigra were collected at Wimereux (Pas-de-Calais, France). This seems to be a rather rare species generally. Antithamnion cruciatum var. defectum has also for the first time been found in situ along the Boulonnais coast. Both taxa are described and their locality and range are reported.
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