Aphanolejeunea microscopica, Breutelia chrysocoma, Harpalejeunea molleri, Jubula hutchinsiae subsp. hutchinsiae, Lejeunea patens, Plagiochila bifaria, P. exigua are seven hyperoceanic bryophytes which have been recently observed in western Massif Central. The French distribution of each of these species is updated. The ecological requirements of these forest rocks dwelling species are summarized. The examination of their reproductive and demographic characteristics highlights their precarious situation and their strong vulnerability. The conservation of this remarkable element requires adopting constraining measures.
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Vol. 34 • No. 3