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.
