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Shrub, 0.6-2.4m; bark smooth; young shoots glabrous or glandular. Leaves 4-9.7 x 2.8-6.6cm, oval to orbicular, base rounded to sub-cordate, entirely glabrous, lower epidermis strongly glaucous-papillate, with scattered viscid glands; petioles glabrous. Flowers 1-2; calyx 4-9mm, cupular; corolla coppery red, with dark nectar pouches and flecks, tubular-campanulate, 35-45mm; ovary densely tomentose and stalked-glandular, style glabrous.
Distribution China (SE Tibet).
RHS Hardiness H3-4a.
This species is allied to R. thomsonii but differs in the flower colour, etc. The whole plant is viscid, as the name implies.