Herbs, perennial. Rootstock long, 3-6 mm in diam., without or with branches. Stems 1 to several, axillary from radical leaves, ascending, terete, 10-40 cm, slender, simple or rarely branched, with 1-3 leaves in upper 1/2. Radical leaves few, 7-9 cm; petiole ca. equal to blade; blade glaucous abaxially, dark green adaxially, triangular-ovate, biternate to bipinnate; pinnae in 2 or 3 pairs, shortly petiolate; pinnules nearly sessile, deeply divided into obovate to lanceolate, 4-5 × ca. 2 mm, acute lobes. Cauline leaves bipinnate, shortly petiolate to nearly sessile. Racemes subsecund, densely 5-15-flowered, elongating in fruit; bracts spatulate-lanceolate, 2-7 × 1-4 mm, entire, pointed. Pedicel 4-8 mm, elongating to 7-12 mm and ± arcuate in fruit. Flowers amaranth to pink, with greenish keels; margin of lower petal often darker. Sepals 1.5-3 × 1-2 mm, ovate, dentate, acute to acuminate. Outer petals subacute, ecristate or with narrow entire crests; spur of upper petal straight, cylindric, 10-13 mm; nectary extended through 1/2-3/5 of spur; lower petal straight with long narrow claw, apically with indistinct lateral rounded lobes; inner petals 9-10 mm, claw ca. 2 × as long as limb. Capsule linear, slightly contorted, ca. 2 cm, glabrous. Seeds in 1 row, rounded, ca. 1.5 mm; caruncle adhering tightly to seed. Fl. and fr. Jul-Sep.
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