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Leaves petiolate; petiole 3–10(13) mm. long; lamina shiny and dark green above, dull and pale yellowish green beneath, elliptic or slightly obovate, 1·5–3·5(4) times as long as wide, 2–16·5 x 1–7·5 cm., cuneate at the base, rounded or acuminate at the apex (acumen 1–3 mm. long), slightly revolute at the margin, coriaceous, glabrous, with 5–9 pairs of secondary veins, with tertiary venation inconspicuous.
Seeds with the grain 11·5–18 x 2–3·5 mm., densely puberulous or densely short-pubescent; rostrum glabrous for 4–11 mm. and bearing a coma for 10–28 mm.; coma erect or rarely reflexed, 48–60 mm. long.
Follicles divergent at an angle of 180°, tapering into a narrow apex, 19–25 cm. long and 2·4–2·8 cm. in diam.; exocarp dark or purplish-brown, thick and hard, glabrous, lenticellate.
Inflorescence 1–3-flowered, sessile or pedunculate, glabrous in all parts; pedicels 5–10 mm. long; bracts triangular or ovate, 1–9 x 1·5–4 mm., not sepal-like.
Stamens 8–12 mm. exserted; filaments straight, 2·6–3·1 mm. long, anthers 26·5–30 x 1·3–2·2 mm., glabrous; acumen 17·5–20 mm. long.
Ovary 1·9– 2·8 x 1·9–3·1 mm. glabrous; style 16–19·5 mm. long; clavuncula 2·6–3·5 x 2·4–2·7 mm., stigma 0·3–0·7 mm. long.
Sepals unequal, the inner larger than the outer, ovate or nearly circular, 6–12·5 x 3·5–7 mm., glabrous.
Liana, 5–15 m. high, presumably evergreen; latex clear or milky.
Trunk up to 5 cm. in diam., branchlets glabrous.
Flowers fragrant.
