Prain & Burkill, J. Proc. Asiat. Soc. Bengal 4: 455 (1908)
Large forest climber to 10(–25) m. Tuber one, sometimes with withering tuber from previous season, dimensions similar to D. pentaphylla, cylindric to pyriform, annually replaced, vertically oriented, subtended by a woody crown. Indumentum present on all parts except male tepals and inner whorl female tepals, most dense on leaf lower surface, inflorescence axes, floral bracts and bracteoles, hairs simple, 0.15–0.3 mm long. Stems 5–8 mm in diam. towards base, 1.5–3 mm on upper stems, twining to the left, perennial, toward base woody and densely spiny, spines lax on upper stem, terete. Leaves (3–)5-foliolate, alternate, leaflet blades narrowly obovate to oblanceolate, single main vein strongly prominent below, secondary veins emerging pinnately from main vein, anastamosing to form a submarginal collecting vein; coriaceous, base acute to cuneate, apex acuminate; petioles 3.8–8(–17) cm long, often spiny, petiolules 4–14 mm long; cataphylls, bulbils and lateral nodal organs absent. Inflorescences pendent, tepals inserted on a small, discoid to very shallowly concave torus, erect, free; male inflorescences racemose, compound, 1 per axil, partial inflorescences 1–4 per axil, peduncles 0.2–0.8 cm long, axes (0.6–)1.2–3.8 cm long; female inflorescences spicate, simple, 1(–2) per axil. Male flowers 0.8–1.6 mm in diam. at anthesis, pedicels 0.4–0.5 mm long, outer tepals 0.7–1.5 by 0.4–1.1 mm, lanceolate to narrowly elliptic, inner tepals 0.7–1.2 by 0.3–1.2 mm, oblong, stamens 3, staminodes 3. Capsules 36–44 by 25–33 mm. Seeds 6–8 by 7–9 mm, lenticular-ovoid, wing 22–26 by 11.5–13 mm, extending from at base, ovate-oblong to narrowly oblong.