Herbs perennial, prostrate (and ?twining), 1-3 m, almost completely glabrous. Petiole 1.3-2.2 cm, pilose apically; leaf blade deeply 3-lobed, 3-3.5 X 2-2.5 cm, base cordate; basal lobes entire or undulate-lobate, median lobe longest, lanceolate, long attenuate. Inflorescences 3-5-flowered; peduncle 2.5-4.5 cm; bracts 2, minute scales. Pedicel 6-13 mm. Sepals obovate, concave, subequal, 6-7 mm, glabrous, margin thinner, sometimes recurved above middle, apex rounded to emarginate, mucronulate. Corolla bright yellow, broadly funnelform, 3-4 cm, midpetaline bands hairy at apex only. Stamens unequal; anthers straight. Pistil equal to longest stamens, included; ovary broadly ovoid, 2-locular, glabrous; ovules 4. Stigma 2-globose. Fruit unknown. Fl. Sep.
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