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Leaves 6–12-foliolate; leaflets 5–13 × 2–2.7(4) mm, obcuneate to narrowly oblong-oblanceolate, rounded to emarginate and mucronulate at the apex, cuneate, glabrous, with dense very minute translucent dots; main nerve central save near base of leaflet; petiole and rhachis together 5–25 mm long, glabrous, produced as a bristle at apex; petiolules 0.5 mm long; stipules leaf-like, 4–18 × 0.5–3(5) mm, lanceolate, apiculate, mostly with a slender subulate appendage on one side at the base, persistent.
Fruit with a tenuous stipe 3–4 mm long, of 1–2 articles joined by a very narrow neck, each article kettledrum-shaped in outline, straight above, very curved below, 2–2.5(3.5) × (1.5)2–2.2(3) mm, compressed or slightly inflated, at first glabrous, later densely minutely tuberculate, sometimes with a raised or even spinous ridge bisecting the article at right-angles to the upper suture.
Standard creamy-white, tinged dull orange-yellow inside and often veined green below, (3)5.5(9 in one variety) × 3 mm at apex, 1 mm wide below, spathulate; wings creamy-white with upper margins or tips orange-yellow; keel petals creamy-white, not laciniate.
Seeds greenish, 2 × 1.5 × 0.9 mm, irregularly lentil-shaped, ± straight or emarginate near the minute round central hilum, margins compressed.
Erect annual herb, 15–60 cm tall, rather sparsely branched with some of the lower lateral branches spreading.
Calyx glabrous, 2-lipped, one 3.5 × 2 mm, ovate, 3-toothed, the other 3 × 1.4 mm, oblong, emarginate.
Stems glabrous.
