Glabrous. Leaves quaternate, sessile, crowded on branchlets with short internodes; lamina narrowly oblong to ovate, mostly 2.5-5 cm long, 1-2 cm wide, cuneate at the base, shortly rounded to acute at the apex, glossy on both sides but darker above; venation pinnate with the midrib prominent below. Inflorescences at the nodes, pedunculate, (2-)4(-6)-rayed umbels of triads with all flowers pedicellate; peduncle 8-16 mm long; rays 2-4 mm long; pedicels 0.5-2 mm long. Corolla in mature bud 4-or 5-merous, 15-20 mm long, slender, weakly clavate and acute, yellow below and red above. Anther 2-2.5 mm long, narrowed upwards, with a broad connective, nearly twice as long as the free part of the filament.
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