Perennial herb, up to 100 cm, with woody rootstock, glabrous; tendrils 2-8 (-10) cm, or none. Leaves simple or rarely faintly 3-lobed, ovate to elliptic, 2-7.5 x 1-5 cm, base subcordate to acute, apex subacute to acute-acuminate, margin single-or double serrate-dentate 1-3 mm deep; petiole 0.1-0.5 cm. Stipules 2.5-8 mm; false stipules asymmetrical, sharply dentate, 0.4-1.5 cm. Inflorescences (1-or)2-flowered; peduncle 1-5.5 cm, bracts 2-6 mm. Flowers glabrous; stipe 5-15 mm; hypanthium 3-4.5 mm wide. Sepals 7-10 mm. Petals 6.5-9 mm. Outer corona-tube 2-2.5 mm, with a plicate, inward-folded edge; threads 1-2 mm. Disc c. 0.2 mm. Inner corona cup-or funnel-shaped, 1.5-2 mm. Stamens 5; filaments 2.5-4.5 mm (sometimes alternating with small tooth-like appendages); anthers c. 2 mm. Ovary 1,5-2 mm; styles 3.5-4.5 mm, connate for 0.5-2.5 mm. Fruit (excluding the 2-4 mm long gynophore) 1.5-2.2 cm, containing 2-4 seeds 8-9 mm. Flowers and fruits Jan.-March, and Sept.-Nov.
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