Tuber unknown. Stem 50--60 cm, simple, basally appressed and retrorse pubescent, medially spreading pubescent. Proximal cauline leaves withered at anthesis; middle ones long petiolate; petiole 5--17 cm; leaf blade pentagonal, ca. 10 × 13 cm, papery, both surfaces pubescent, base cordate, 3-parted; central lobe broadly rhombic, 3-fid; lateral lobes obliquely flabellate, unequally 2-parted to middle. Inflorescence terminal, ca. 28 cm, many flowered; rachis and pedicels retrorse pubescent; proximal bracts leaflike, distal ones narrowly ovate or ovate-lanceolate, ca. 1.1 cm. Pedicels 1--2.3 cm, with 2 bracteoles at middle; bracteoles ovate or broadly ovate, ca. 8 × 4 mm. Sepals purple, abaxially pubescent; lower sepals oblong, ca. 1.2 × 0.6 cm; lateral sepals obliquely broadly obovate, ca. 1.3 × 1.5 cm; upper sepal galeate, ca. 1.2 cm high, ca. 2 cm from base to beak; beak short, ca. 2 mm. Petals sparsely pilose, ca. 2.4 cm; limb ca. 9 mm; lip ca. 4 mm, 2-lobed at apex; spur ca. 1.5 mm. Stamens glabrous; filaments entire. Carpels 5, appressed pubescent. Fl. Aug--Sep.
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