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Fitosociologia numero 46 (1)

pag. 3-10: Signification phytosociologique de Brassica oleracea ssp. oleracea sur les falaises atlantiques européennes

J.-M. Géhu

16 rue de L’Eglise, F-80860 Nouvion en Ponthieu, France

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abstract

Phytosociological significance of the Brassica oleracea ssp. oleracea on the European Atlantic cliffs. The article in the first part describes two cliff’s associations of Brassica oleracea on the Channel shores: Sileno maritimae-Brassicetum oleraceae on the Dorset coast (England) and Picrido hieracioïdis-Brassicetum oleraceae on the Picardy-Normandy cliffs (France). The second part of the article analyzes the literature data that show that on the European Atlantic coasts Brassica oleracea sub. oleracea is a plant much more linked as Asplenium marinun at Crithmo-Armerietalia Géhu 1964 then to Parietarietalia Rivas-Martinez in Rivas-Goday 1964. There are many transgressive species on the calcareous grasslands of Brometalia erectis that differentiate a new sub-alliance, the “Festuco pruinosae-Brassicenion oleraceae“ within the aeroaline alliance of Crithmo-Armerion maritimae Géhu 1968.

keywords

Brassica oleracea, Atlantic cliffs, aeroalina vegetation.