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Shrub or small tree; young shoots glabrous. Leaves in whorls of up to three, at the ends of the branches, 2-8 x 1-6.5cm, broadly rhombic, apex acute with tip blunt, lower surface covered with long brown hairs; petioles densely brown-villose above, glabrous below. Pedicels covered with brown pubescent hairs. Flowers 1-2 per inflorescence, appearing before the leaves; calyx minute; corolla rose-purple, funnel-campanulate, 20-30mm; stamens 8-10; ovary densely pale brown villose, style glabrous.
Distribution Japan (Honshu, Kyushu).
RHS Hardiness H4a-b.
R. nudipes is allied to R. reticulatum (q.v.).
Var. kirishimense is said to differ in its pubescent young shoots and smaller leaves (1.5-4.5 x 1.2-3cm) with apex obtuse, may be in cultivation.