Pterolobium membranulaceum

Author: (Blanco) Merr.

Morphological description
Liana .

Leaves : petiole and main rachis 10-21 cm long, pubescent; pinnae 5-10 pairs, long, pubescent(membran Pterol TYPE ). Leaflets (4-)6-8 pairs per pinna (membran Pterol TYPE detail ), oblong, rarely obovate, 8-13 by 4-8 mm, crenulate, glabrous; nerves c. 5 pairs, both nerves and veins well visible on both surfaces (membranulaceum Pterol lft FM42).

Inflorescences terminal and axillary, 10-35 cm long, loosely flowered, pubescent; bracts narrowly lanceolate, c. 2 mm long; pedicels 6-8 mm, sparsely puberulous, glabrescent.

Flower : Hypanthium c. 1 mm long, glabrous. Calyx lobes obong or oblong-ovate, 4-5 by 1.75-2 mm, glabrous outside, puberulous on lower part inside. Petals : standard obovate, c. 4 by 2.5 mm, with the margin slightly inflexed near the middle, glabrous outside, slightly puberulous inside and on the margins near the base; others similar one another, obovate, c. 4 by 1.75 mm, glabrous except ciliate on the margins near the base. Stamens : 7-9 mm, densely hairy except the apical part; anthers oblong, c. 0.8 mm long. Ovary c. 2 mm long, shortly stipitate, glabrous except on the placental side, 1-ovuled; style 5-7 mm.

Pods (membran Pterol TYPE detail )stipitate (stipe c. 2 mm); seed-bearing part elliptic, 1.5-1.8 by 0.8-1 cm, glabrous, obscurely, loosely reticulate; wing 3-3.5 by 1-1.3 cm, basal part narrowed along one side towards half of the fertile part.

Seeds seen very young.

Malesia : Philippines (Luzon).

Habitat & Ecology
In thickets at low and medium altitude. Fl. September; fr. November, December

The stamens are oblique in an open flower, similar to those of Genus Caesalpinia .