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Shrub to 1m, usually epiphytic, also on cliffs; minutely scaly at first quickly becoming smooth and glabrescent. Leaves 9-15 x 6-11cm, broadly elliptic, sub-ovate occasionally subcircular or sub-obovate, the apex broadly obtuse, rounded or retuse, often with a small hard recurved apiculus, margin recurved, the base cordate to auriculate; upper surface minutely and obscurely pale brown stellate-scaly, the midrib strongly raised for 1/2 to 2/3 of the length, lateral veins 10-16 pairs, strongly raised and with the lamina deeply sulcate between so that the leaves are more distinctively ‘ribbed’ than any other species; lower surface with the midrib strongly raised and the laterals deeply impressed, scales rather dense, brown-lobed to stellate with small centres. Flowers 1-5 per umbel, semi erect to horizontal; calyx a low scaly disc, corolla pale yellow, broadly funnel-shaped, glabrous outside; stamens 10, spreading all round the mouth of the flower; ovary softly white-hairy, the style glabrous.
Distribution Borneo (S Sarawak and W Kalimantan).
RHS Hardiness H1a-b.
This species is grown as much for its bizarre looking leaves as for the flowers. If grown in full sun the leaves become very pale yellowish in colour often with a bronze tinge which makes it either wonderfully exciting or sick-looking depending on the viewpoint of the observer. If grown in shade the plants are quite acceptably green and growth better.