... watercourses along the roads, moist sites at the foot of upland, grassy bogs, felled and burnt areas, abandoned meadows and plough-lands.Area: North, Middle and Southeast Europe, boun- dary of West ... frequency of hybridization in the northern boundary of their areas (Latvia, Ireland and others).Hybridization between A. incana and A. glutinosa should be assigned to the type “B” by M (1974), ... in the zone of continuous distribution of the species. Some increase in fre-quency of hybridization is noted by the northern boundary of the species areas, which is possibly connected to their...