CHAPTER XII 

 CULTIVATED SPECIES 



R. albiflorum. 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. 1 



R. amcznum. 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. arboreum. Himalaya, &c., up to 10,000 feet. 1811. 

 A tree, 20-50 feet. Evergreen. Leaves lanceolate, grey- 



1 The terms tender and hardy refer to the behaviour of the plants in the 

 London district. 



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