Herbs, perennial, glabrous. Tuber rounded, 8-15 mm in diam. Stems ascending to erect, 12-20 cm, simple or with a late branch from prophyll, with 2 leaves. Leaves biternate; leaflets lanceolate to ovate, entire or deeply cut into lanceolate lobes; segments entire to ?serrate. Raceme 3-or 4(-12)-flowered, at first dense then lax; bracts ovate, equal to or slightly shorter than pedicels, entire or apically dentate. Pedicel 5-10 mm, at fruiting slightly elongated. Flowers pale indigo, margin of outer petals deep purple. Upper petal ca. 20 mm, curved; spur upwardly directed, 10-14 mm; nectary extended through 1/2-2/3 of spur, apex shortly acuminate; lower petal with broad emarginate limb and conspicuously saccate claw; inner petals ca. 8 mm, crest short, not extended beyond petal apex. Stigma compressed-square, apex with 4 papillae. Capsule ovoid to obovoid, ca. 1 cm. Fl. and fr. Apr-May.
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