Slender herb, up to 70 cm tall, glabrous or minutely puberulous. Leaves linear, 5–30(–45) x 0.5–2(–3) mm, acute to obtuse. Racemes terminal, to 30 cm long; bracts soon falling; pedicels c. 1–2 mm long. Outer sepals 1–2 mm long, ciliolate, the lower ones connate; wings elliptic, 3–3.5 x 1.5 mm, soon falling. Upper petals obovate-spatulate, almost as long as keel; keel c. 4 mm long, pink to purple, with a fringed appendage at the tip. Capsule ovate, c. 3–5 x 2.5–3 mm, deeply emarginate and with 2 acute unequal lobes at the apex, glabrous. Seeds c. 2.5 x 1 mm, with white hairs; caruncle pointed, pubescent, with a pair of lateral appendages c. 0.5–0.6 mm long.