Slender glabrous liana; stems terete. Leaves opposite; petioles 1-1.5 cm long; blades ovate to oblong-elliptic, abruptly short-acuminate, usually rounded at base, 8-15 cm long, 5-7 cm wide. Inflorescences axillary, subumbellate, bearing few flowers; peduncles 1-2 mm long; pedicels ca 1 mm long; flowers 5-parted, greenish-yellow; calyx lobes +/- ovate, ca 2 mm long, ciliolate; corolla lobes ovate-oblong, ca 2 mm long, spreading, ciliolate, with a narrow, whitish margin; corona segments ca 2.5 mm long. Follicles narrowly ellipsoid, ca 13 cm long and 3.5 cm wide; exocarp thick; seeds many, with tuft of long white trichomes at apex. Shattuck 341(?), Garwood 103. Rare. Seasonal behavior undetermined. Flowers at least in June, July, and October, with the fruits maturing in June and August.