Standl., Contr. Arnold Arbor. 5:95, pl.14.1933
Woody liana; stems 6-ribbed or grooved, long-hispid, with milky sap; tendrils axillary, forked, bracteate at fork, the arms watchspring-like; pubescence brown-pilose all over but with upper leaf surface between veins glabrous. Leaves pinnate; stipules paired, lanceolate, to 3 cm long, ciliate; petioles 1-12 cm long; rachis winged; leaflets 5, ± elliptic or elliptic-oblong, acuminate, acute at base (lower pair often rounded or subcordate), 2.5-22 cm long, 1.5-11 cm wide, remotely dentate. Thyrses short, glomerulate, in leaf axils or borne on tendrils; flowers white, ca 5 mm long; sepals 5, oblong, glabrous; petals 4, oblong to obovate, acute, the scales ca three-fourths as long as petals, their crests yellow, slender, pointed, the scales of the anterior petals held together by villous trichomes, the glands of the anterior petals slender, erect, flattened; stamens 8; filaments ± glabrous, fused into a tube at base; ovary 3-angled, glabrous; styles 3, longer than staminal tube. Capsules reddish, suborbicular,1-1.5 cm long, 3-celled, 3-winged, glabrous; seeds 1 or 2, oblong-obovate, dark, shiny, covered at base with a white aril. Croat 4000a, 8723.
Occasional, in the forest. Flowers mostly in the late dry season (March and April). Most fruits mature in the
late rainy season, some in the early dry season.
The flowers and fruits usually occur on leafless stems near the ground.
Known only from Panama. In Panama, known from tropical moist forest in the Canal Zone and Bocas del Toro and from premontane rain forest in Colón and Panama (Cerro Jefe).