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Flowers in lax terminal and axillary racemes up to 30 cm long, the axillary ones always subtended by a foliage leaf (not a bract) and forming a narrow angle of about 30°, their axis rather stout (1–2 mm diameter) and stiffly erect, densely pubescent to tomentose; bracts 5–8(11) × 0.7–1.5(2) mm, linear-triangular, fairly conspicuous, slow to fall; pedicels (4)5–8 mm long.
Calyx (4)5–8(10) mm long, densely pubescent to villous with usually long whitish hairs interspersed among shorter brown hairs; two upper teeth free for ½–¾ their length, the lateral teeth approximately equalling the tube.
Stems glabrous to sparsely appressed-pubescent in the lower and middle parts, becoming increasingly more pubescent in the upper parts towards the peduncles and racemes.
Petals purple or reddish or brownish-purple, or the keel usually much paler; standard (14)15–19 mm long.
Annual or short-lived perennial with erect, fairly stout, herbaceous, branched stems 60–140 cm high.
Pods 52–75 × 4.5–5 mm, shortly pubescent with usually irregular geniculate hairs.
Ovary pubescent; style pubescent.
Stamen tube joined above.
Seeds (14)16–19.
