A shrub up to 6 m tall or liana up to 30 m long, with white latex; stem up to 12 cm in diameter; bark with small grooves, dark grey or brown; branches smooth, grey- or red-brown, branchlets hairy. Leaves opposite, simple and entire; stipules absent; petiole 1–5 mm long, hairy; blade obovate to oblong, 1.5–9.5 cm × 1–4.5 cm, base cuneate to rounded, apex acute to acuminate, glabrous on both sides, pinnately veined with 5–10 pairs of lateral veins. Inflorescence an axillary or terminal cyme, lax or congested, few- to many-flowered; peduncle 0.5–4.5 cm long, hairy. Flowers bisexual, regular, 5-merous, fragrant; pedicel 2.5–30 mm long; sepals free or nearly so, broadly ovate to oblong, 1–4 mm long, apex obtuse to acute, red-brown or greenish, minutely hairy; corolla tube cylindrical to cup-shaped, 3–5.5 mm long, minutely hairy, with tufts of hairs and distinct scales inside, white, pink or orange, lobes narrowly ovate or strap-shaped, 5–21 mm × 1–2 mm, apex acuminate, white or yellow, sometimes red striped, variably hairy outside, glabrous inside; stamens inserted near the base of the corolla tube, included, anthers almost sessile, forming a cone over the pistil head; ovary half-inferior, globose to cylindrical, consisting of 2 carpels connate at the very base, style 0.5–1.5 mm long, pistil head c. 1 mm long. Fruit consisting of 2 almost free, narrowly cylindrical follicles 30–45 cm × 0.5–1 cm, pendulous, hairy, many-seeded. Seeds narrowly ellipsoid, laterally compressed, 14–19 mm long, black, with a tuft of hairs 35–50 mm long at apex. |