Forest trees of the Pacific slope . rly to Mexican boundary. On mountain slopes, low summits,elevated valleys and canyons, but not on plains nor near sea; in north, usually at1,.500 to 3,000 feet elevation, and in south, at 4,000 to 7,000 feet. Oregon.—Very abundant in valleys of central and southern part, west of Cascades,from McKenzie River (lat. 44° 15) southward; on mountain slopes considerably above2,000 feet, entering lower part of yellow pine belt, and being especially frequent on 316 FOREST TREES OF THE PACIFIC SLOPE. streams in semiarid sections of lower Cascade and Siskiyou slopes. L
Forest trees of the Pacific slope . rly to Mexican boundary. On mountain slopes, low summits,elevated valleys and canyons, but not on plains nor near sea; in north, usually at1,.500 to 3,000 feet elevation, and in south, at 4,000 to 7,000 feet. Oregon.—Very abundant in valleys of central and southern part, west of Cascades,from McKenzie River (lat. 44° 15) southward; on mountain slopes considerably above2,000 feet, entering lower part of yellow pine belt, and being especially frequent on 316 FOREST TREES OF THE PACIFIC SLOPE. streams in semiarid sections of lower Cascade and Siskiyou slopes. Locally noted onupper Rogue River, in depressions between western spurs of southern Cascades andnorthern spurs of Siskiyous, and also on North Fork of Apple^ate Creek in Siskiyous. California.—Throughout northern part in lower part of yellow pine belt and upperrange of Sabine pine; generally at 2,000 to 5,000 feet, probably going westward toinland border of coast redwood belt, and eastward at least to longitude of Mount Shasta,. Fig. —Qucrcus californica. around base of which it occurs (in Shasta National Forest) up to 4,500 feet on southand west sides; rather common in McCloud River valley, but more so about Sisson,being especially abundant northward to south end of Shasta Valley; frequent areasat elevations between 2,000 and feet on Squaw Creek, while large pure standsoccur on lower McCloud, Pitt, and Sacramento rivers. Abundant on west slope ofnorthern Sierras in canyons within yellow pine belt, at 3,000 to 5,000 feet elevation, FOREST TREES OF THE PACIFIC SLOPE. 817 but in Stanislaus National Forest ranging between 1,500 and 6,500 feet. Locally notedin Yosemite Valley, at 4,000 feet, in pure growth west of Camptonville, in Yuba County,and vicinity of Lake Tahoe. In southern Sierras, generally at 4,500 to feet,where it occurs as follows: North Fork of Kings River; Bubbs Creek (head tributarySouth Fork Kings) up to Bubbs Dome; Frazier Mountain; East For
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