Herbs, perennial, 10-25(-40) cm tall, glabrous; stems and petioles of radical leaves attenuate to filiform underground base. Storage roots fascicled, spindle-shaped, 10-15 × 3-5 mm, sessile or very shortly stalked. Stems 1(or 2), simple, with 1 leaf at stem middle. Radical leaves few; petiole 2-10 cm; blade very glaucous abaxially, green adaxially, orbicular, 1.5-3 cm, firm, ternate; leaflets shallowly to deeply 3-lobed. Cauline leaves sessile or shortly petiolate; blade 1.5-3(-5) cm, ternate; leaflets once to twice deeply and irregularly biternatisect; lobes entire or again deeply divided, ovate to linear. Raceme 3-9 cm, 5-20-flowered; bracts ovate to lanceolate, 6-15 mm, acute, entire or rarely lowermost lobed. Pedicel thin, 5-10(-15) mm, elongating to 7-20 mm in fruit. Sepals minute. Petals light to dark clear blue, rarely with purplish suffusion; inner petals clearly darker at apex, but dorsal crest not so dark; upper petal navicular, 11-17 mm, narrowly crested or without crest; spur conical, 4-9 mm; nectary ca. 1/2 as long as spur, extremely thin; lower petal oblanceolate, 9-11 mm, crest small; inner petals 7-9 mm. Stigma with 4 apical marginal papillae; geminate papillae lateral and on tip of large basal lobes. Capsule linear, 8-11 × 1-1.5 mm, 5-9-seeded; style ca. 2.5 mm. Seeds 1-1.2 mm, smooth, with small appressed elaiosome. Fl. May-Sep, fr. Aug-Sep.
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