Ipomoea parasitica (Kunth) G. Don

Annual vines; stem twining, woody at base, herbaceous towards tip, usually muricate, glabrous, terete, hollow. Leaves alternate, simple, 4-22 x 3-20 cm, ovate to deltoid, apically acuminate, mucronulate, basally cordate (rarely truncate), glabrous below, sparsely pilose above; midrib and lateral nerves raised beneath; petiole up to 30 cm long, puberulous. Flowers in axillary, few to several (up to 30) flowered cymes; peduncle up to 25 cm long, pubescent, terete; bracts small, linear-lanceolate, 1-1.5 x 1 mm; pedicels short, 2-2.5 cm long, pubescent, slightly dilated above. Sepals 5, more or less same size, outer 2 elliptic, 4-5 x 3 mm, apiculate, pilose outside, glabrous inside, scarious, inner 3 elliptic-oblong to widely ovate, 5x 3-3.5 mm, apiculate, pilose only on outerside of midrib, glabrous inside, scarious. Corolla purple, throat whitish, campanulate, tube up to 4 cm long, white, mouth up to 3.5 cm across, slightly 5-lobed. Stamens inserted; anthers up to 3 mm long; filaments white, attached 7 mm above the corolla base, subequal, 2 long up to 1.1 cm, 3 short up to 0.9 cm long, white ciliolate at base. Ovary conical, 1 x 1 mm, glabrous; disc small, annular; style inserted, up to 1.3 cm long, glabrous; stigma bilobed, 1 x 2 mm, papillate. Fruits capsular, broadly ovate to globular, 1.8-2 x 1.5-1.9 cm, with persistent style base; pedicels enlarged and recurved; fruiting sepals slightly enlarged and reflexed; seeds 4, ovate to elliptic, 8-9 x 6-7 mm, glabrous to pubescent, black.