CHAPTER XII 
CULTIVATED SPECIES 
R. alhiflorum. — N. America. 1838. An erect shrub, 3 
feet high. Deciduous. Leaves lance-shaped, bright-green, 
glabrous, i inch long. Flowers on axillary drooping 
peduncles, bell-shaped, i inch across, five-lobed, creamy- 
white ; calyx large. Hardy.^ 
R. amcEnum. — China. 1853. A compact, flat-topped 
shrub, 3 feet. Evergreen. Leaves ovate, dark-green, hairy 
beneath, i inch long. Flowers in small terminal clusters, 
corolla hose-in-hose, i inch across, magenta. Usually con- 
sidered to be a form of R. indicum, but quite distinct. 
There are several named varieties of it. Hardy. 
R. anthopogon . — Central and Northern Asia, 16,000 feet. 
1820. A dwarf shrub. Evergreen. Branches twiggy, 
clothed with scales. Leaves small, densely scaly, red-scaly 
underneath ; odoriferous when bruised. Flowers in loose 
corymbs, bell-shaped, small, pale-yellow. Hardy. 
R. arborescens. — N. America. 1825. A shrub, 3-10 feet. 
Deciduous. Leaves leathery, bright-green, glaucous beneath, 
with a few bristly hairs. Flowers later than the leaves, 
tubular, 2 inches long, white or tinged with rose, slightly 
hairy, stamens red, fragrant. Hardy. 
R. arbor eum. — Himalaya, See., up to 10,000 feet. i8ir. 
A tree, 20-50 feet. Evergreen. Leaves lanceolate, grey- 
^ The terms tender and hardy refer to the behaviour of the plants in the 
London district. 
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