This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Creeping herbs or sarmentose often prickly shrubs. Leaves distant, alternate, simple, lobed, or 3- to 5-foliolate, or impari-pinnate. This genus is remarkable for the fleshy drupes usually aggregated on a conical receptacle, and 1-seeded by abortion. The species are very numerous, and especially abundant in the northern hemisphere. A few are ornamental or curious. The old Latin name.
1. R. fruticosus. Bramble. - Some of the varieties are very pretty, as the double white, double rose, and cut-leaved.
2. R. bifldous. - This species is remarkable for its tall pure white spiny stems and is often seen under the name leucodermis, but that name belongs to a totally distinct plant. Leaves simple, trilobate or ternate, glabrescent above, white and tomentose beneath. Flowers white, very abundant and showy. Fruit about the size of the Blackberry, deep orange or orange-red. Nepal.
3. R. odoratus. - Stem erect, unarmed, clothed with purplish hispid glandular hairs. Leaves large, simple, 3- or 5-lobed; lobes toothed, the central one largest, pubescent beneath. Flowers very large, purplish rose. Fruit orange-red. This is a very showy plant, from North America.
4. R. spectdbilis. - An unarmed or spiny shrub about 6 feet high. Leaves dense, ternate or trilobate; leaflets or lobes serrulate. Flowers bright red, axillary, solitary, on long pendulous peduncles. Fruit orange-red. Native of Northwestern America.
5. R. drcticus. - This is an interesting little species about 6 inches high, with trifoliolate leaves and deep red flowers. Arctic regions.