Herbs, 15-25 cm tall, glabrous. Rhizome apparently creeping, longer than 15 cm, 1.5-3 mm in diam. Leaves simple, basal and cauline; leaf blade adaxially dark green, broadly ovate, 2.5-3.5 × 3-4 cm, abaxially sparsely puberulent, often pruinose, reticulate veins conspicuous, adaxially glabrous, base deeply cordate with rounded lobes subequal, margin remotely spinose-serrate, apex acuminate. Flowering stem with 1 simple leaf at base of rachis. Raceme 8-10 cm, 8-12-flowered; rachis glabrous. Pedicel 1-2 cm, glabrous; bracts ovate, ca. 1.5 mm. Flowers purple. Sepals in 2 whorls; outer sepals 4, purple, 2 of them lanceolate, ca. 3 × 1.2 mm, others ovate, ca. 3.5 × 2.5 mm; inner sepals 4, yellow, lanceolate, ca. 3 × 1.2 mm. Petals 4, purple, suboblong, ca. 1.2 mm, without spur. Stamens 4, ca. 2.5 mm; filaments flat; anthers ca. 1.8 mm, apex obtuse. Pistil ca. 2 mm; style ca. 1 mm. Capsules ca. 1 cm; style ca. 3 mm. Seeds 1 or 2, brown, reniform, ca. 3.5 mm, glabrous. Fl. Apr-May, fr. May-Jun.
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