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

210 FOREST TREES OF THE PACIFIC SLOPE.
OCCURRENCE.
Sea coast dunes and low hill slopes and on streams in moist, pure or humous sand
and in dryish, poor, gravelly soil. Occurs in clumps and dense patches of pure growth
in open and in shade of swamp pine and live oak.
CLIMATIC CONDITIONS.-Similar to those of swamp pine.
TOLERANCE.-Very tolerant of shade.
REPRODUCTION.-Abundant seeder; young plants frequent both in shade and open
moist ground,
FIG. 83.-Myrica californica, young shoot.
Family SALICACEIE.
A large group of trees (and shrubs) comprising the well-known willows and
poplars or aspens. The bark is characteristically bitter-especially so in the
willows. The leaves, shed in early autumn, are borne alternately on the
branches (never in pairs on opposite sides of the branch). Male and female
flowers are each produced on different trees; seed is therefore borne only by