moss-covered hornbeam trunk. humid subtropics of colchis (between the caucasus and the black sea

mosscovered trunk hornbeam humid subtropics colchis caucasus black sea snowcovered subtropical winter brium tree moss cover unexpected snow south unsettled disturbed fickle april shower instable transitional treacherous variable changeabl weather sudden cold transition bush frost forest freeze green wintertime early prewinter period late fall season belt zone true mosses bryales epiphytes air plant life