De I. VNER VEW D Forest Trees of the Pacific Slope

FOREST TREES OF THE PACIFIC SLOPE.
LONGEVITY.-Very little is known of the age, but it is believed to be a longlived
tree. It appears to grow persistently, but very slowly, in height and diameter,
as shown by its small size. Trunks from 4 to 8 inches in diameter are
from 60 to 110 years old, and those from 12 to 18 inches through are from 170
to 265 years old. Further study of its growth and age is required.
RANGE.
Central California, on coast ranges and west slope of Sierras.
Coast ranges, from Big River (Mendocino County) to Marin and Napa counties and
south of San Francisco Bay region to Santa Cruz Mountains (Santa Clara County).
Noted as follows: Mendocino County: West slope Coast Range north to Big River near
Mendocino; on hills east of Russian River Valley bordering road from Ilopland to Highland
Springs, growing on both sides of Mendocino-Lake county boundary, especially on
south side of gulch leading to Russian River Valley ; western part Stony Creek National
Forest, in lower forest belt. Lake County: Bartlett Springs (east Lake County) ; west of
Clear Lake from point about 5 miles west of Highland Springs to lIopland, continuing over
summit into east Mendocino County ; east side of Mount St. Helena (large trees in
canyon below Tollhouse) ; canyon of Putah Creek (road from Middletown to Cobb Valley).
Napa County: South slope of Mount St. Helena between 2,500 and 3,600 feet, and
probably higher; Goat Rock (about a mile south of Tollhouse), on ridge forming east
boundary of Napa Valley. Sonomua County: Big Sulphur (or Pluton) Creek Canyon
(vicinity of Geysers) ; Dutch Bill Canyon (near Meeker). Marin County: Mount Tamalpais,
in many gulches, canyons, basins, and chaparral main ridge; Cataract Canyon,
notably near lower fall, at about 1,000 feet. Santa Cruz County: Near La Honda and
sparingly in other localities (Santa Cruz Mountains). Sierras, west side from northeastern
Tehama County, on southwest slope (Mill Creek) of Lassens Butte, at about
4,800 feet, to Tulare County (T. 21 S., R. 30 E ), occurring sparsely in gulches and
canyons, at from 2,000 to 4,500 feet. Next stations southward from Lassens Butte are
Deer Creek Canyon (south Tehama County) and canyons of Chico and Butte creeks
(northwest Butte County) ; 30 miles southward, on upper Yuba and Feather rivers;
noted near Dobbins (just west of Oregon Hills, Yuba County). Stanislaus National
Forest, very rare in Eldorado and Calaveras counties; here noted on Empire Creek
(tributary South Fork of Am'.rican River), at 2,500 feet elevation; on north slopes of
South Fork of Mokelumne River, at 2,000 to 2,500 feet; San Antonio Creek (tributary
South Fork of Calaveras River), at 2,000 feet, and on South Fork of Webber Creek, at
3,000 feet. Southward, in Tuolumne County near mouth of South Fork at Colfax
Springs; in Mariposa County, found at Mariposa and on Merced River in lower Yosemite
Valley; near Dinkey Bigtree Grove (T. 10 S., R. 26 E.) and on Mill Creek (tributary of
Kings River, T. 14 S., R. 27 E.) in Fresno County; in canyons along stage road to
Giant Forest; in Sequoia National Park on road to Mineral King; East Fork, and other
branches of Kaweah River, at 3,950 to 6,000 feet ; locally noted in Coffeepot Canyon
(tributary East Fork Kaweah River), on stream near Comstock Mill, and on Kaweah
River between Kane Flat and Bigtree Canyon. Lower courses of Tule River branches
and southward (to T. 21 S., R. 30 E.). Detailed range not fully determined.
OCCURRENCE.
In moist gravelly or sandy gulches, springy coves, and narrow watered canyons. Dependent
upon soil moisture. Forms dense thickets alone or occurs in mixture with
canyon live oak, white alder, western sycamore, broadleaf maple.
TOLERANCE.-Very tolerant of shade throughout life, its own dense shade often excluding
other growth.
REPRODUCTION.-Seeding habits not determined. Reproduction confined to moist exposed
soil or litter where seeds are fully covered by floodwaters ; usually rather scanty.
TAXUS. YEWS.
The yews, very distinct as a group, are not strikingly distinct as species.
There is great similarity in the appearance, structure, and qualities of the wood
of different species, and also in the general appearance and form of the foliage
and fruit. The shape and habit of growth, and minor differences in the form and
color of the leaves, are mainly relied upon to distinguish the different species.
They are world-renowned trees. The wood of one species inhabiting Europe,
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