Herbs, perennial, 20-30 cm tall, glabrous; stems and petioles of radical leaves attenuate to filiform underground base. Storage roots fasciculate, fusiform, sessile or indistinctly stalked, 8-14 × 1-4 mm. Stems 1 or 2, very thin, simple, with 2 leaves in upper 1/3 or 1/4. Radical leaves very few; petiole ca. 6 cm; blade ternate, with sessile narrowly elliptic leaflets ca. 1 cm. Cauline leaves: petiole of lower leaf 3-13 mm, petiole of upper leaf 1-5 mm; blade slightly glaucous abaxially, green adaxially, triangular, ternately or pinnately divided with 1 or 2 pairs of linear leaflets 1-4 cm, abaxially with raised midvein. Racemes 2-4-flowered, dense at anthesis, slightly elongating in fruit; bracts linear-lanceolate, 7-25 mm, decreasing in size upward. Pedicel ca. 4 mm, erect-spreading in flower, in fruit 6-10 mm and sharply recurved at base. Sepals ca. 0.3 × 0.5 mm, deeply dentate. Corolla yellow, with distinct brownish veins; inner petals tipped with dark brownish purple; outer petals not crested, subacute; upper petal 12-14 mm; spur almost straight or very slightly downcurved, 5-6 mm, slightly tapering; nectary prominent, ca. 1/2 as long as spur; lower petal straight, with indistinct claw and only slightly dilated limb; inner petals 6-7 mm. Fruit linear-oblong, 13-15 × ca. 2 mm, 8-10-seeded; style ca. 2 mm. Fl. Aug, fr. Aug-Sep.
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