Hypserpa polyandra Becc.
Beccari, O. (1877) Malesia 1: 148. Type: New Guinea, Andai, O. Beccari,P. P. 552. Syn: FL. Aru Is., 1873, O. Becari s.n. Syn: K.
Vine stem diameters to 14 cm recorded. 'Growth rings' very distinct in transverse sections.
Leaf blades about 7-14 x 3.5-7.5 cm, petioles about 2-4.5 cm long. Leaf blades +/- 3-veined near the base. Reticulate venation very well developed with virtually all reticulations closed, i.e. complete. The leading shoot forms a sort of tendril and loops around objects. Oak grain visible in the larger twigs. Pulvinus elongated, extending well beyond the petiole-leaf blade junction.
Male flowers: Inflorescence much shorter than the leaves, flowers about 4-5 mm diam., subtended by 4 sepal-like bracts about 1 mm long. Sepals seven or eight in two whorls of three or four. Sepals about 3 mm long, petaloid, boat-shaped. Petals eight or nine per flower, each petal about 1.5 mm long, fleshy, resembling nectary glands. Stamens 30-35 per flower, each about 0.8-1 mm long. Anthers +/- sessile. Female flowers: Tepals about 10 per flowers. Outer tepals larger than the inner tepals. Inner tepals +/- orbicular, cupped, about 1.5 mm diam. Carpels about 1 mm long.
Fruits, i.e. fruiting carpels, about 10-12 mm diam. Endocarps about 10 mm diam. rather thick and hard, somewhat flattened, surface sculptured and deeply grooved. Seeds flattened, about 9-10 mm diam. Endosperm white. Embryo white, curled almost forming a circle. Cotyledons about 8 mm long and about as wide as the radicle. Radicle about 8-9 mm long.
Features not available.