KARYOLOGICAL STUDIES IN STACHYS RECTA L., S. LABIOSA BERTOL., S. SUBRCRENATA VIS., S. FRAGILIS VIS. Somatic chromosomes of some closely related taxa belonging to the Stachys recta - complex were investigated. Specimens were collected in populations growing in the Friuli Venezia Giulia region (NE-Italy). The chromosome number 2n = 34 of both S. labiosa Bertol. and S. recta L. is confirmed. The chromosomes numbers of S. subcrenata Vis.: 2n = 34 and S. fragilis Vis.: 2n =
34 are new. Discussions and remarks on the differences between the karioytypes of these taxa are given.
PHYTOSOCIOLOGICAL EVALUATION OF THE CAREX BRACHYSTACHYS COMMUNITIES IN THE WESTERN JULIAN ALPS. The mountain Carex brachystachys communities which colonize the cool, wet and shady rocks of the Western Julian Alps are phytosociologically described.
On the basis of a numerical classification this vegetation type has been assigned to Caricetum brachystachyos Lüdi 1921 and its endemic component discussed.
Theoretical remarks about the use of corological criteria in syntaxonomy are put in evidence.