 Vegetation varies depending on the water supply and altitude of the site , with an upper altitude limit of 4 @,@ 300 – 5 @,@ 000 metres ( 14 @,@ 100 – 16 @,@ 400 ft ) beneath of which the vegetation takes the form of a scrub steppe . Grasses at 5 @,@ 000 metres ( 16 @,@ 000 ft ) include Festuca , Stipa and in wetter areas also genera like Calamagrostis . Scrub like <unk> and <unk> <unk> occasionally form dense scrub patches . 
