Herbs, perennial, glabrous or with minute 1-celled hairs. Tuber rounded, 1-2 cm in diam. Stems geniculate at nodes, ascending, 4-15 cm, simple or usually branched from prophyll, usually with 2 leaves. Leaves (ternate or) biternate; blade pale green, sometimes with white dots or markings; leaflets entire to divided; segments obovate to linear-oblong. Raceme densely (1-)4-10-flowered; bracts flabellate or obovate, equal to or slightly shorter than pedicels, dentate to pectinately divided, rarely entire. Pedicel straight, at flowering 4-14 mm, at fruiting 10-15 mm. Flowers pale blue, sometimes with purplish tone; inner petals white. Outer petals broad, margin entire, apex retuse; upper petal 20-26 mm; spur straight, cylindric, (9-)11-14 mm; nectary extended through (1/2-)2/3 of spur, apex acuminate; lower petal straight or slightly saccate in middle, limb broad at base, smoothly narrowed toward apex, with prominent smooth rounded emargination; inner petals 8-12 mm with dorsal crest not or very slightly surpassing petal apex. Capsule fusiform to oblong, 15-22 × 3-4 mm, 4-10-seeded. Seeds in 2 rows. Fl. and fr. Mar-Apr(-May).
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