Article

Arenaria grandiflora L. (Caryophyllaceae) is a species occurring in centrai and southem Europe more or less frequent in the mountain calcareous cliffs and slopes. Il al so occurs in the Ile-de-France where it is very rare and therefore included among the protected taxa.With the aim of clarifying the origin of such local rarity, some populations of A. grandiflora from Fontainehleu (Ìle-de-France) and other localities, where this species is more spread, have been studied as far as their genetic diversity and germinating rate are concemed. On the basis ofthe resul ts, some considerations are made in order to rescue the species in questiono