An erect, ascending or low, spreading shrub or shrublet, 0.1-1.5 m tall, with branches either soft and leafy or ending as strong, pungent, naked branch thorns. Young branches light yellow or brown, white-puberulous or (when thorny) glabrescent. Leaflets linear, 2.5-6 mm long, 0.5-1 mm thick, subterete or slightly depressed, acute-apiculate (with apex sometimes slightly recurved). Flowers carnose, medium-sized, solitary, on axillary short-shoots; often numerous, dispersed along the branches below leafy or thorny branch ends. Bract linear-lanceolate, 3-4.5(-5.5) x 0.3-0.8 mm. Pedicel 1.2-2.2 mm long, short-pubescent. Bracteoles 3-5(-6.5) mm long. Calyx broadly and openly campanulate, glabrous or with scattered hairs, dorsally double-ridged; lobes narrowly triangular, 2-4(-4.7) mm long, basally widened and with ± carnose margins, apically tapering, acuminate. Petals bright yellow, or standard ± red or purple. Standard blade 6.2-9.5 x 7.3-10.5 mm, subglabrous, with scattered hairs on the midrib and sometimes on distal marginal parts of the back. Wing blades (5-) 6-8.3 x 3-4.5 mm, glabrous or partly ciliate, usually with 3 foldlets arranged alongside each other. Keel blades ± rostrate, (4.7-)5.5-6.2 x 3-3.8 mm, apically ± upcurved, obtuse or nearly pointed with indistinct basal bulge. Pistil glabrous; ovules 2. Pod (enclosed in the long-persistent corolla) 7.2-10 x 3.5-5.2 mm, rugose.
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Erect or spreading shrub to 1.5 m, branches sometimes ending as thorns. Leaves 3-foliolate, leaflets linear, subterete or slightly depressed, with tip sometimes slightly recurved, glabrous. Flowers single, scattered, yellow, or standard partly red or purple, wings with 3 foldlets arranged alongside each other, wings glabrous or partly ciliate along margins, keel ± rostrate, glabrous, calyx compressed with double ridge between upper 2 lobes, glabrescent, lobes awl-shaped with carnose margins. Pods covered in persistent floral parts.
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