Th e issue contains research papers of the 3th International Scientifi c conference «Kamelinskiechtenija» dedicated to the memory of Rudolf Vladimirovich Kamelin. Th e articles present the followingdirections: the systematics of vascular plants; fl oristic (current state of fl oras, fl ora genesis, methods ofinvestigation and analysis); botanical-geographical and fl oristic zoning.For specialists in the fi eld of botany, ecology, environmental protection and for all interested inquestions of the study, protection and rational use of fl ora.