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*A robust climbing shrub up to 6 m tall, branchlets glabrous; leaves .*Leaves elliptical to obovate, 2.5-15 cm × 1-5 cm, base cuneate, apex acuminate to caudate, glabrous or pilose beneath; inflorescence .*Inflorescence 8.5-18 cm long, sepals .*Sepals lanceolate or narrowly elliptical, 10-17 mm × 3-4 mm, without colleters inside, corolla tube about 5-7 cm long, distinctly widened halfway, lobes 1.6-4 cm long, style with stigmatic pistil head about 3.5 cm long; in cultivation rarely fruiting.  In its native area, ''A. cathartica'' is found in mangrove swamp and on river banks. Several cultivars have been developed in ''A. cathartica'' . "Grandiflora" has flowers of exceptional size, "Hendersonii" has orange-yellow flowers with white spots in throat, tinged bronze, lobes thick and waxy, and "Nobilis" has large and strongly whorled leaves, with very large, pure gold flowers.