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A tall evergreen climber with glabrous, angled young stems. Leaves rather thin, ovate-lanceolate, narrowly oblong-ovate or almost elliptic, 2 to 5 in. long, 3⁄4 to 2 in. wide, rounded or broad-cuneate at the base, narrowed at the apex, glabrous, finely toothed or almost entire; petiole about 1 in. long. Flowers usually solitary, the outer segments greenish yellow, the inner orange, about 5⁄8 in. wide, borne on stalks not more than 1 in. long. Males with up to ten perianth segments, the stamens united into a more or less globose head. Female flowers with more numerous segments than in the male. Mature carpels scarlet, in spikes up to 6 in. long: Bot. Mag., t. 4614.
Native of the Himalaya; in cultivation 1828. It is a tender species, at one time cultivated in greenhouses.