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ALPINE ZONE — The portion of land that lies above treeline. Extreme weather conditions make survival impossible for tall trees. If trees do exist, they grow no higher than a few feet high and tend to sprawl across the ground. Alpine plants usually have adaptations for minimizing the effects of wind, cold temperatures, short growing seasons, dry conditions, and ultraviolet radiation.
Also see: ALPINE ADAPT ADAPTED
Vegetation of Yosemite National Park
The alpine zone of Yosemite begins near the 9500 foot (2900 m) elevation and is easily distinguished as it is above tree line. No trees grow in this zone ...
Grand Canyon Plants
... big sagebrush, blackbrush and rubber rabbitbrush grow in this zone. ... yarrow, cinquefoil, lupines, sedges, and asters, brave the sub-alpine climate. ...