Herbs, perennial, usually glabrous, sometimes finely papillose-hairy. Tuber yellow, rounded, 1-2.5 cm. Stems ± erect, 10-30 cm; prophyll often with late branch or sometimes with axil-lary tuber; cauline leaf axils usually without branches. Cauline leaves 2 (rarely 3), slightly thick, once to 3 × ternate, dark green, ± glaucous; leaflets entire to deeply cut; segments broadly elliptic to oblanceolate or linear, margin entire to coarsely dentate, apex obtuse or mucronate. Raceme 5-20-flowered; bracts ca. equal to pedicels, cuneate, usually much divided, rarely less divided. Pedicel at flowering 5-10 mm, at fruiting 10-20 mm. Sepals small, not obvious. Flowers blue, white, or royal blue, sometimes with a purplish tint. Outer petals apically emarginate with a distinct mucro in notch, margin of limb shallowly dentate; spur of upper petal straight or apex slightly downcurved, 10-14 mm; nectary extended through 1/3-2/3 of spur, apex obtuse; inner petals 9-12 mm. Stigma compressed-square, apically with 4 simple marginal papillae; geminate papillae lateral and on well-developed basal lobes. Capsule linear, smooth to subtorulose, 16-26 mm. Seeds in 1 row, ca. 1.5 mm, smooth; caruncle narrow. Fl. and fr. Apr-Jun.
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A herb. It keeps growing from year to year.
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