Glabrous except for the inflorescences and flowers sparsely to densely white-or pale brown-tomentose. Leaves in whorls of 3-8; lamina lanceolate to oblong, 10-21 by 2-8 cm, shortly cuneate at base to a petiole 8-20 mm long, usually acuminate and acute at apex, glossy above, dull below; venation pinnate, distinct above and the midrib prominent for its full length below. Inflorescences at the nodes and on the epicortical runners, pedunculate 6-to 8-rayed umbels of triads with all flowers variably pedicellate; peduncle 3-7 mm long; rays 1-3 mm long; pedicels 0.5-1.5 mm long, rarely obsolete. Corolla in mature bud (4-)5(-6)-merous, 22-33 mm long, slightly dilated in the lower part, weakly clavate and acute at apex, yellow; petals long coherent after anthesis, especially in the lower 1-2 mm. Anther 2-3 mm long, about equal to the free part of the filament.
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