Pterolobium macropterum Kurz

Liana up to 15(-30) m high. Leaves: petiole and rachis (10-)14-25 cm long, pubescent; pinnae 5-9 pairs. Leaflets 4-6(-10) pairs per pinna, oblong or oblong-elliptic, 7-15 by 4-9 mm, entire, glabrous above, sparsely pubescent along the midrib and often with a tuft hair at the base on one side of the midrib; nerves and veins invisible or obscure on both surfaces. Inflorescences 15-30 cm long, rachis and branchlets pubescent, glabrescent, or glabrous, loosely flowered; pedicels 10-15 mm. Hypanthium 1.5-2 mm high, glabrous outside. Calyx lobes oblong, 4-4.5 by 1.5-2 mm, glabrous except puberulous on the lower surface inside and ciliate on the margins. Petals: standard obovate, 4.5-6 by 2.5-3.5 mm; the others obovate, 4.5-6.5 by 2-3 mm, glabrous. Stamens: filaments 6.5-8.5 mm, usually hairy at the lower 1 /2 — 2/3. Ovary c. 3 mm long, very shortly stipitate, puberulous, 1-ovuled; style 6-7 mm, sparsely puberulous. Pods shortly stipitate (stipe 1.5-3 mm); seed-bearing part 1.7-2 by 0.8-1.4 cm, reticulate, glabrous; wing 3.5-4.5 by 1-2 cm, basal part gradually narrowed along one lateral side of the seed-bearing part towards its upper 1/3-1 /2. Seeds only inmature seen.