Article

This study deals with the co-evolutionary determined interrelationships between the complex of plants flowering in mid-summer on the southern limestone slopes of Vitosha Mts. and their pollinating agents. The most numerous are the plant species with flag and gullet (zygomorphic) blossoms. Numerous are also the plants with dishlbowl (actinomorphic) blossoms. As a whole dominate the purple coloured blossoms, followed by the yellow ones. The pollinators visit most actively the plants with zygomorphic blossoms, mainly those that are purple in colour. Most numerous pollinators ofthe entomophilous plant complex flowering in the mid-summer on the southern limestone slopes of Mt. Vitosha are bees.