98 POKEST TREES OF THE PACIFIC SLOPE. 



tree at 5,500 to 7,000 feet — sometimes to 7,800 feet, and straggling down to 3.000 feet. 

 Locally noted as follows: Mount Hood (timberline) on head of East Fork of Hood River 

 at 6,400 feet, and of Clear Fork at 5.100 feet, down on southwest side to a little below 

 Government Camp (3,600 feet); on north side to about 3,000 feet; Mount Jefferson; 

 headwaters of Clackamas River, at about G.000 feet ; Salt Creek ; divide between Row 

 River and Middle Fork of Willamette River. Cascade National Forest (South), abundant 

 on both sides of Cascades and on Umpqua-Rogue River Divide ; on east side, at 6,000 

 to 9,200 feet, and on west side, at 5,900 to 9,200 feet: best growth at 6.200 to 7,000 

 feet. High summits of Siskiyous — also on north slopes of Siskiyou Feak. but not detected 

 east of Cascades, in Klamath ranges. Locally noted at Crater Lake (rim of Crater), 

 down to near Pole Bridge Creek (6,100 feeth and on Mount Scott, up to 8.000 feet. 

 California. — Northern cross ranges and west side of Sierras southward to Bubbs 

 Creek at head of South Fork of Kings River (lat. 36° 40'), probably also in San Jacinto 

 Mountains. " generally at from 6,000 to 11,000 feet elevation. On northern mountains 

 from Siskiyous and Trinity Mountains eastward to ranges north of Mount Shasta and 

 west of Butte Creek, including Goose Nest Mountain, extending northward to the 

 Oregon line, reappearing on Glass Mountain (boundary of Siskiyou and Modoc counties) 

 at 7,500 to- 9.000 feet, Siskiyous above 6,000 feet. Reported in mountains east of Cres- 

 cent City (Del Norte County). Marble Mountain Divide (west of Scott Valley, Siskiyou 

 County i on summit of pass (5,700 feet), and on higher parts of ridge. Trinity County: 

 Canyon Creek, at point about 7 miles north of Dedrick, at 4.500 feet elevation, and 

 northward to head of creek, here mingled with Shasta fir and weeping spruce. North 

 part of Mount Shasta National Forest, at 7,000 to over 8,000 feet ; throughout southern 

 part at elevations from 6,500 feet to timberline (8,000 to 9,000 feet). Mount Shasta, at 

 various points between 7,200 and 8,700 feet. Abundant on west side of northern Sierras, 

 at 6,000 to 10,000 feet; less frequent in southern part, and at S,000 to 11,000 feet. 

 In Lassen Feak, Plumas, and Diamond Mountain National Forests at elevations above 

 6,000 feet and on such peaks as Lassen Peak, slopes near Drakes, Spanish Peak, and 

 Mount Pleasant. Tahoe National Forest, Mount Fillmore and southward on all summits, 

 at elevations from 7,500 to timberline (about 10,000 feet), except on main divide between 

 south end of Sierra Valley and north line of Sierraville Quadrangle (Sierra County) ; 

 locally noted on Pyramid Peak (It miles above Fornis), near Ralston Peak, in Devils 

 Basin (east of Pyramid Peak), and on high summits near Donner, at 7,500 to 8,500 

 feet. Stanislaus National Forest, on summits at 6,900 to 9,400 feet. Here locally 

 noted on divide south of North Fork of Mokelumne River (9 miles north of Bloods) ; 

 Mount Reba (north Fork of Mokelumne River)'; near Wood's place (road to Kirk- 

 wood). Placerville Pass and adjacent peaks southwest of Lake Tahoe, at 7,500 feet 

 to timberline. Sierra National Forest, summits at elevations between 8,000 and 

 11,000 feet, and southward to Bubbs Creek (tributary, South Fork of Kings River, 

 T. 14 S., R. 33 E.), reaching east slope of Sierras at head of Owens River ; lower part 

 Kearsarge Pass, at north base of West Vidette Mountain and canyon between Vidette and 

 Junction Meadows. Locally noted as follows : Mokelumne Pass (headwaters of Silver 

 Creek and upper Mokelumne River) ; Tuolumne Meadows, at 9,500 to little over 10,000 

 feet on White Mountain and Mount Conness, Lookout Knob, Lambert Dome, ridge 

 between Dingley and Delaney creeks, old Tioga mine, upper Tuolumne Canyon, base of 

 Unicorn Peak. Cathedral Lakes and Teak, head of Cathedral Creek, Lyell Fork of Tuo- 

 lumne, at 10,500 feet; head Snow Creek (Mount Hoffman), about May Lake, and south- 

 west flank of mountain down to 8,500 (near Tioga road) ; near Lake Tenaya ; head of 

 Mono Creek and Pass; Sunrise Peak (between Tuolumne Meadows and Yosemite). at 

 10,000 feet; Tuolumne Dome, at 8,000 feet; Snow Canyon (Yosemite Park): Kings 

 Creek Mountain ; head of North Fork of San Joaquin River, at 8,000 feet, and on its 

 tributaries Silver and Fish creeks, at about 10,000 feet ; Bubbs Creek. San Jacinto 

 Mountains, on Wellman Flat, at 7,500 feet. 



The detailed range of mountain hemlock in Idaho and Montana will be dealt 

 with in a later bulletin. 



OCCUBEENCE. 



Mainly at timber line, but in far north at sea level. Southward, vertical range is 

 determined by gradual ascent of favorable climatic and moisture conditions, until, at 

 south, the tree is confined to high, cold, moist, mountain slopes and valleys. Thrives in 

 most well-drained soils, not too dry ; but best in loose, coarse, moist ones. 



a This remarkable extension of range is supported by a photograph of a large tree 

 taken in 1899 ( ?) by T. P. Lukens. It is hoped that this record may be fully verified 

 later. 





