Herbs. Rhizomes vertical, 2-3 mm in diam., internodes less than 1 cm. Leaves solitary; petiole uniformly green, 6-15 cm, pubescent; leaf blade abaxially uniformly light green, adaxially dark green, occasionally with white blotches, ovate-cordate or narrowly ovate, 5-9 × 2.5-5 cm, abaxial surface glabrous, adaxial surface sparsely pubescent along veins and margin, base cordate or auriculate-cordate, lateral lobes 2-3.5 × ca. 4.5 cm, apex acute or shortly acuminate; cataphylls ovate, ca. 2 × 1.3 cm. Peduncle ascending to recurved, ca. 1 cm. Calyx purple-green, rotate, 3-4 × 3-5 cm; sepals connate beyond attachment to ovary, abaxially glabrous; tube obconic, ca. 1.5 × 1.2-2 cm, strongly constricted at throat, adaxially tessellate, orifice ring ca. 1.5 mm wide; lobes ovate, 1.8-2.2 × 2-2.8 cm, base with papillate-corrugate area, slightly undulate along margin. Stamens 12, triangular; filaments much shorter than anthers; connectives slightly extended beyond anthers, acute to obtuse. Ovary half-inferior. Styles free, apex 2-forked and slightly uncinate; stigmas lateral; oblong-ovoid. Fl. Apr.
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