Stems 30--60(--(90) cm tall, spreading pubescent, unbranched. Basal leaves few, 2-ternate; petiole 8--19 cm; leaf blade abaxially sparsely pubescent to subglabrous, adaxially glabrous; lateral leaflets obliquely obovate-cuneate, unequally 2-lobed; central leaflet obovate-cuneate, 1.5--3.5 × 1.2--2.8 cm, 3-lobed and segments with 2 or 3 obtuse teeth. Stem leaves few. Inflorescences cymose, 1--5-flowered; bracts linear-lanceolate, to 1.6 cm. Flowers 3--3.5 cm in diam. Pedicel 1.2--5 cm. Sepals dark purple, narrowly ovate, ca. 2.5 × 0.8--0.9 cm. Petals dark purple, suberect, broadly oblong, ca. 1.2 cm, apex subtruncate; spur ca. 1.5 cm, apically incurved. Stamens nearly as long as petals; anthers yellow, broadly ellipsoid, 1.5--2 mm. Staminodes ovate, ca. 5.5 mm. Pistils 5; ovary densely hairy. Follicles 1.5--2.5 cm; persistent styles ca. 5 mm. Fl. May--Jul.
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