This subspecies represents the Chinese or eastern version of R. arboreum.It grows as a large shrub and does not attain the tree-like proportions of the Himalayan arboreum.The flowers are typically deep crimson to carmine and very attractive in mid- to late spring.The leaves are glossy with deeply impressed veins above and a spongy white to fawn indumentum beneath.A widespread variety occurring in various habitats from 5,000 to 11,000 ft. in a range extending from NE India, Burma and SW China to Thailand and Vietnam.
1973/345(delavayi)(+15).
1977/800(delavayi)Crarae(+15).
1995sd246PW#91:RSBG(+10?\R1\6).Grown from seed collected wild at 5,430 ft. in Guizhou Province, China.
1995sd253PW#94(+10 to +20?\R1\6).Seedlings from seed collected at 5,430 ft. in Guizhou, China.