Spiny shrubs; spines green, branched. Leaves 3-foliolate on young plants, reduced to spines or scales on older plants. Fls yellow, solitary in leaf axils. Bracteoles 2, at apex of pedicel. Calyx membranous, yellow, 2-lipped; upper lip minutely 2-toothed; lower minutely 3-toothed. Style somewhat curved. Pod explosively dehiscent, 2-valved, 1-6-seeded. Worldwide: 20 species in W Europe and N Africa Britain: 5 taxa. |
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