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Shrub, to 3m. Leaves 4-7 x 1.5-3cm, elliptic to obovate, apex obtuse or notched. Flowers single, borne laterally below vegetative buds, crimson broadly funnel-shaped; tube c.15mm; lobes rotund, c.10mm; stamens 5.
Distribution China (S Yunnan), adjacent parts of Laos and Vietnam.
RHS Hardiness H1-2.
Some plants in cultivation under this name are referrable to R. leptothrium, from which it may be distinguished by the shape of the corolla. Its status in cultivation is therefore doubtful.