FOKEST TREES OF THE PACIFIC SLOPE. 55 



Longevity. — Little is definitely known of the longevity of this pine. It ap- 

 pears to attain its average full growth in from GO to 80 years; trees from 20 

 to 24 inches in diameter are from 40 to 50 years old. Recurring fires, to which 

 it has been subjected, seem to prevent its longer survival. If permitted, it 

 would probably not attain an age of over 150 years except in a broken and 

 decrepit form. 



RANGE. 



California. — Foothills, lower mountain slopes, and high valleys (at north) of coast 

 ranges and Sierras. 



Coaxt Ranges. — Prom upper Sacramento and Trinity rivers and Hoopa Valley (on 

 Klamath River, Humboldt County) to southern cross ranges; generally at elevations of 

 500 to 4.000 feet — occasionally to 5,000 feet. Shasta County: North limits, delta in 

 Sacramento River Canyon, above mouth of IMtt River, at 1,150 feet, and at point 15 

 miles up MeCloud River ; eastern limits, isolated bodies in northeastern corner of county 

 on hills west and south of Fall River, and on Hat Creek (near Cassel), main hody end- 

 ing 2 miles east of Montgomery Creek (tributary Pitt River) ; west limit, on west side 

 of Sacramento Valley on ridge west of French Gulch at 2,400 feet ; south limit, immedi- 

 ately en Sacramento River at Anderson (11 miles south of Redding). Trinity County: 

 North limits, Trinity River and Weaver Creek considerably above Weaverville at 2,100 

 feet. Canyon Creek (10 miles above Junction) at 2,400 feet; western limit, east side 

 Mad River Valley on bottom slopes of South Fork Mountain. Humboldt County: Only 

 in Trinity River bottoms, mainly in noopa Valley (north limit), Supply Creek Canyon 

 and Redwood Creek (west of Hoopa Valley near Bair ranch), west limit. Tehama 

 County: Eastward on west side of Sacramento Valley to point 8 miles west of Red Bluff 

 (700 feet), and 2 miles southwest of Paskenta ; on coast range (fi miles west of Beegum 

 post-office) at 3,000 to 3,400 feet. Mendocino County: Westward to west slopes of Eel 

 River, at 1,900 feet, and northward on Russian River to Ilopland. Sonoma County: 

 Westward to west side of Russian River; southward to Alexander Valley (Russian River, 

 si hi Hi limit in coast ranges). Xapa County: South and southwest slopes of Mount St. 

 Helena at 400 to 2.S00 feet, southward on ridge east of Napa Valley to point several 

 miles south of Calistoga : also on ridge west of Napa Valley nearly to Rutherford (south 

 limits in north coast range). Yolo County: Eastward to east ends of ranges on both 

 sides of Capay Valley (south limit in north coast mountains). Colusa County: East- 

 ward in Sacramento Valley foothills to hills about Sites, ridge west of Antelope Valley, 

 hills hordering Cortena Creek, to point within about 10 miles of Williams, and to 

 one between Arbuckle and Dunnigan (Southern Pacific Railroad). Lake County: Gen- 

 eral between 2,500 and 3,000 feet, but on north slope of Mount St. Helena only up to 

 1,500 feet. South of San Francisco, on north slopes of Monte Diablo (Contra Costa 

 County) at 800 to 3,000 feet, and on east slope near headwaters of Marsh Creek. Mount 

 Hamilton Range (Santa Clara County), west side at 2.000 to over 4,000 feet; also 

 farther south about Gilroy Hot Springs. Not in Santa Cruz Mountains west of Santa 

 Clara Valley nor about Monterey Bay (Monterey County). Common in Santa Lucia 

 Mountains, east of summit, at 400 to 2,500 feet ; and also on west slopes in vicinity of 

 I. os Burros. Abundant in Reverse Canyon south of Arroyo Seco and east of Santa Lucia 

 Peak: also on nearly all slopes on south side of divide, except on Santa Lucia Peak; 

 south of Santa Lucia Peak about 1 mile below Milpitas schoolhouse ; on San Antonio 

 Creek to Jolon and vicinity upper San Antonio Creek slopes and tributaries to 2.000 or 

 2,500 feet, here meeting lower border of Coulter pine; southeast border of Monterey 

 County on hills about Triest Valley, and eastward into west border of Fresno County. 

 8am Benito county: Common on Gabalan and San Benito ranges; Chelone Creek Canyon 

 and neighboring hills; higher bills west side of Bear Valley and northward on higher 

 parts of Gabalan Range to point opposite Tres Pinos ; second ridge east of San Benito 

 Valley (south of San Benito post-office I, and farther south on hills most of the way to 

 Hernandez and New Idria ; hills about Bitter Water Valley. In San Luis Obispo National 

 Forest, at 1,000 to 3,000 feet. Noted a few miles south of Templeton on east side San 

 Luis Obispo Divide, but very rare on west side of San Joaquin Valley from south border 

 of San Benito County southward to end of valley. Below 4.000 feet in San Rafael and 

 San Emigdio mountains, and on north slopes of Mount Pinos ; Santa Ynez Range, at 

 500 to 5,000 feet ; slopes of Sierra Liebra and extending nearly down to Antelope Valley. 

 Sierras: General on west side, in upper foothills, from mouth of Pitt River to Walker 

 Basin. In northern part, chiefly at 500 to 2,500 feet — sometimes to 3,000 feet, or in 

 canyon of South Fork of Yuba River, to 4,200 feet; in central part, range mostly 800 to 

 3,000 feet, but occasionally reaching 4,000 feet. Tehama county: West limit on Sierra 

 foothills, 7 miles east of Red Bluff (on Sacramento River) ; east limit, 1 mila east of 

 Paine post-office, at 3,000 feet, and Lyonsville. Butte County: Westward to point 2 miles 



