Cascades (ecoregion) - Level IV Ecoregions - High Southern Cascades Montane Forest (4e)

High Southern Cascades Montane Forest (4e)

The High Southern Cascades Montane Forest ecoregion is an undulating, glaciated, volcanic plateau punctuated by isolated buttes and cones. Many tarns occur. With an elevation that varies from 4,000 to 8,200 feet (1220 to 2500 m), it is an intermediate zone between the Southern Cascades and the Subalpine/Alpine zone. Cryic soils support mixed coniferous forests dominated by mountain hemlock, lodgepole pine, and Pacific silver fir; they are colder than the mesic and frigid soils of the Southern Cascades. Grand fir, white fir, and Shasta red fir also occur and become more common toward the south and east. Whitebark pine is found at high elevations. Understory plants include woodrush, Prince’s pine, lupine, and sidebells shinleaf. At the highest elevations, open meadows support Shasta buckwheat, Newberry knotweed, and Brewer's sedge. The region tends to be drier than the Cascade Crest Montane Forest, with a longer summer drought and more intermittent streams. The region covers 915 square miles (2,370 km2) in Southern Oregon and includes the lower elevations of Crater Lake National Park.

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