Bog vegetation is a typical component of phytolandscapes of Georgia (Kimeridze 1992). It covers an area of approximately 200 ha. Bogs are very common on Colchic Lowland and South-Georgian Volcanic Upland, populating chiefly lowlands and subalpine belt, whereas in mid-mountain and alpine zone they are rare. The commonest bogs in Georgia are eutrophic, of which mesotrophic and oligotrophic formation occupy limited area. Under the special conditions of subalpine belt of the Greater Caucasus oligotrophic pit bogs are developed on crusts of weathering of different rocks.