Madagascar rubbervine

Branches glabrous to hairy, usually with few conspicuous lenticels. Leaf blade usually oblong or elliptic to ovate, sometimes broadly ovate to rarely obovate or almost orbicular, 2-11 × 1.5-5.5 cm, almost truncate to usually tapering at base, usually acuminate at apex, glabrous to hairy below or on both sides or along veins only; petiole 3-10 mm long, glabrous to hairy. Internodes of cymes 5-15 mm long; pedicels 3-7 mm long, usually hairy; bracts 2-7 mm long. Calyx lobes narrowly ovate to elliptic, 5.7-12.8 × 2.7-5.4 mm, with non-reflexed margins. Corolla tube (9-)15-25 mm long; lobes (20-)25-44 × (8-)14-26 mm. Corona lobes 6-9 mm high, entire. Staminal cone 3.2-5.2 mm high; anthers 2.7- 4.5 mm. Translator spathe ovate, 1.3-1.8 mm long, acute at the apex. Style 1.3-3.4 mm long; style including style head 4.8-6.8 mm long. Follicles (5-)7-9 × 1-3 cm, glabrous to finely pubescent. Seeds 5-8 mm long; hairs 2-3 cm long