Herbs, perennial, 30-100 cm tall, glabrous. Stems procumbent to ascending, slender, rooting at nodes, leafy and branched throughout; low late sterile branches procumbent, forming bulb-based leaf rosettes at nodes. Rosette leaves few; petiole 6-18 cm, with fleshy base 0.5-0.8 × 0.3-0.5 cm; blade glaucous abaxially, green adaxially, 2-5 × 2-4 cm, biternate; primary leaflets stalked, secondary shortly stalked to sessile, obovate, thin, shallowly to deeply 2-5-divided; lobes obovate, obtuse. Cauline leaves: petiole 4-10 cm; blade 2-10 × 2-6 cm, like rosette leaves. Raceme lax, 7-13-flowered; lower bracts like upper cauline leaves, 1-2.5 × 1-2 cm; middle shallowly ternatisect, 0.5-1 cm; upper oblanceolate, ca. 0.5 cm, entire. Pedicel ca. 10 mm in flower, 10-18 mm in fruit, erect in fruit. Sepals white, ca. 1.5 × 1-1.5 mm, finely dentate. Corolla purple; inner petals whitish. Outer petals with rather narrow shortly acuminate limb, not crested; upper petal 21-25 mm; spur straight, narrowly cylindric, 10-13 mm; nectary 1/2-3/5 as long as spur; lower petal 12-14 mm, with long claw and narrow rhombic, acute, shortly acuminate limb; inner petals 10-12 mm. Stigma subquadrangular; marginal simple papillae: 2 median distinct, lateral diffuse; geminate papillae lateral (submarginal) and in basal corners; basal lobes not developed. Capsule pendent from erect pedicel, linear, 15-22 × ca. 1.5 mm, 13-20-seeded, explosively dehiscent; style ca. 2 mm. Seeds in 1 row, 1.1-1.2 mm, smooth. Fl. and fr. Aug-Sep.
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