HEATH FAMILY 
121 
2. RHODODENDRON L. 
Shrubs with entire leaves. Flowers in umbels or corymbs. Calyx very 
small. Corolla funnelform. Fruit a capsule. (Greek rhodos, rose, 
and dendron, a tree.) 
1. R. occidentale Gray. Western Azalea. Deciduous shrub 1 to 2.3 
m. high; leaves obovate, 2.4 to 9.6 cm. long; flowers white, rarely pinkish; 
corolla 3.6 to 4.8 cm. long, the upper lobe with a yellow splotch; stamens 
5, exserted.—Stream banks in canons. 
2. R. califomicum Hook. Rose Bay. Evergreen shrub 1.5 to 4 m. 
high; leaves leathery, oblong or elliptic, 7.2 to 9.6 cm. long; flowers rose- 
purple ; corolla 3 cm. long, the upper lobe greenish-dotted; stamens 10, 
included.—Near the coast, Santa Lucia Mts. n. to Del Norte Co. 
3. ARBUTUS L. Arbute Tree 
Trees with evergreen coriaceous leaves and white flowers in an ample 
terminal panicle of dense racemes. Corolla globular or ovate. Anthers 
2-awned on the back. Fruit a many-seeded berry with a rough surface. 
(Latin name of the Arbute tree under which, says Horace, idle men 
delight to lie.) 
1. A. menziesii Pursh. Madrono. Tree 8 to 28 m. high ; bark at first 
satiny green, turning to yellow or salmon-color, and finally aging to 
deep red; leaves elliptic or ovatish, 4.8 to 12 cm. long; berries fleshy, 
4 to 10 mm. in diameter.—Hillsides or mountain slopes. It is a highly 
ornamental tree. The berries were used as food by the native tribes. 
4. ARCTOSTAPHYLOS Adans. Manzanita 
Evergreen shrubs with crooked branches, dark red smooth and polished 
bark. Leaves more or less vertical by twisting of the petiole. Flowers 
white or pink, disposed in a sub-globose panicle of short spikes or ra¬ 
cemes. Corolla urnshaped. Anthers 2-awned on back. Fruit a dry 
brown or red “berry” with several stony nutlets, the nutlets either dis¬ 
tinct or more or less consolidated. (Greek arktos, a bear, and staphule, 
a grape; bears feed on the berries.) 
Ovary glabrous; leaves and branchlets glabrous or essentially so. 
Stems several from a heavy root-crown which crown-sprouts freely; pedicels 
glandular; foliage very white-glaucous. 
Berry with solid stone; S. Cal. and South Coast Ranges . 1 . A. glauca. 
Berry with separate nutlets; Sierra Nevada foothills chiefly....2. A. viscida. 
Stems solitary, not enlarged at base, not crown-sprouting; pedicels not glan¬ 
dular or only obscurely or minutely so; foliage green..3. A. manzanita. 
Ovary pubescent; leaves and branchlets pubescent or usually so ; flowers white. 
Stems solitary, not enlarged at base, not crown-sprouting. 
Leaveswnostly 8 to 14 mm. long; berry glabrous; nutlets thin-shelled.... 
4. A. sensitiva. 
Leaves mostly 2.4 to 4.8 cm. long; berry microscopically white-hairy; 
nutlets thick-shelled.5. A. columbiana. 
Stems several from a heavy root-crown, freely crown-sprouting; leaves mostly 
2.4 to 3.6 (or 4.8) cm. long; berry minutely short-hairy; nutlets thick- 
shelled. 
Bark not shreddy. 
Branchlets not hispid; ovary not glandular.6. A. canescens. 
Branchlets or some of them more or less hispid; ovary hairs glan¬ 
dular.7. A. glandulosa. 
Bark markedly shreddy..8. A. tomentosa. 
