Some observations on two populations of Pulmonaria montana (Boraginaceae) from the Gaume (Belgian Lorraine).

Two populations of Pulmonaria montana Lej. have been observed in Gaume (Mor tinsart and Muno), South Belgium. The length and width of two basal leaves, length of the calyx, corolla, style and stamen, as well as the dimensions of the pollen grains were measured. The morph ratio was also estimated in t his heterostylous species. Moreover, the amount of seeds per flower was cou nted. Our aims are: (1) investigate the adequacy of the parameters chosen i n species determination and (2) give some data on this poorly investigated heterostylous species.