Liana up to 20 m high. Stems terete or slightly flattened, 1-1.5 (rarely more) cm ø; branchlets tomentose or villous, glabrescent. Leaves subcoriaceous, suborbicular, broadly ovate, sometimes ovate, rarely ovate-oblong, (14-) 24-33 by (6-) 11-24 cm; apex acuminate or shortly so; base cordate, sinus 1.5 (-3) cm deep; upper surface pubescent on the midrib and nerves; undersurface villous or densely tomentose, glabrescent; basal nerves one pair reaching upward to halfway or higher; lateral nerves pinnate, 4 or 5 pairs, prominent beneath, distinct, sometimes depressed above; veins crossbar-like or reticulate, slightly elevated with distinct areoles beneath, rather obscure above; petiole stout, terete, (3-) 6-14 cm, c. 5 mm ø, villous or tomentose, glabrescent. Inflorescences cauligerous, solitary, racemiform, axis c. 4 cm long, internodes spacious, tomentose or densely pubescent; bracts small, triangular, c. 3 mm long, densely pubescent. Pedicel and ovary up to 7 cm long, tomentose or pubescent. Perianth pale yellowish green, pubescent outside; utricle cylindric, c. 7 by 1 — 1.5 cm, the apical 1 — 1.5 cm strongly bent backward; tube cylindric, 4 by 0.6-1.2 cm, closely parallel to the utricle; limb deeply 3-lobed, lobes triangular, 3 by 4.5-6 cm, apex obtuse. Stamens and style column unknown. Capsules elongate-oblong, 14-15 by 2.5-3 cm, 6-ridged, dehiscing from the apex downward, tomentose or pubescent. Seeds convex on the lower side and ovoid-like in side view or seen from beneath, not winged, c. 8 by 5 mm, deeply concave on the upper side with a prominent, central, longitudinal, septum-like funiculus, testa smooth on both surfaces.
Home