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Annual or short-lived perennial herbs, 15-60 cm, glabrescent to pubescent, sometimes glandular. Stems decumbent, prostrate or ascending, much branched. Stipules ovate-lanceolate, to 10 mm, entire or toothed, base rounded or hastate, apex acuminate; petiole 1-2 cm; leaflets elliptic, ovate, or obovate, 5-20 × 4-6 mm, papery, pubescent, lateral veins to 10 pairs, base cuneate, margin distally obscurely serrate, apex truncate or retuse, apiculate. Flowers 10-20 in small heads; peduncles slender, straight, longer than subtending leaves, glabrate to densely appressed pubescent; bracts bristlelike, minute; pedicel less than 1 mm. Calyx ca. 2 mm, glabrate to densely hairy. Corolla yellow, 2-2.2 mm; standard suborbicular, apex retuse, longer than wings and keel. Ovary broadly ovate; ovule 1. Legume reniform, ca. 3 × 2 mm, sculptured with concentric arcuate veins, sparsely hairy, black when ripe. Seed 1, brown, ovoid, smooth. Fl. Apr-Sep, fr. Jun-Oct.
A ± pubescent annual or short-lived perennial, with prostrate or ascending stems up to 50 cm. long.. Stipules green, cordate on the free side at the base, lanceolate, toothed, the teeth about as broad as long; petiole very short in the upper leaves, up to 2·5 cm. in the lower leaves; rhachis above lateral leaflets 2–3 mm. long; leaflets cuneate-obovate, up to 14 mm. long by 12 mm. wide, pubescent on both surfaces.. Peduncle up to 3·5 cm. long; raceme dense, 5–20-flowered; bracts white, filiform, ±0·5 mm. long; pedicel ± 1 mm. long.. Calyx pubescent, 1–1·5 mm. long, the teeth subulate at the tip, rather longer than the tube.. Corolla yellow, 2·5–3 mm. long.. Pod 1-seeded, strongly veined, curved through 180°, ± 3 by 2 mm., sparsely pubescent, black when ripe.
Annual or biennial with prostrate or ascending stems to 8 dm; stipules lanceolate, entire or toothed; lfls elliptic to obovate, 1–2 cm; peduncles much exceeding the subtending lvs; heads globose to short-cylindric, to 1 cm; fls yellow, 10–50 per head, 2–4 mm; pods nearly black, 2–3 mm, reniform, unarmed, 1-seeded, the conspicuous veins tending to be longitudinal; 2n=16. Native of Eurasia, common as a weed in our range and elsewhere. May–Sept.
Short-lived perennial or annual herb, 0.2-0.6 m long; densely covered by simple, tawny, appressed hairs. Central leaflets up to 6 x 7 mm, cuneate-obovate, margins slightly toothed in upper part. Stipules lanceolate, irregularly toothed. Flowers 2.5-3.5 mm long. Petals: standard subrotund; wings shorter than keel. Flowering time Oct.-Jan. Pod with only distal end coiled, black; smooth or with small tubercles; 1-seeded.
An annual or short lived perennial herb. The stems are downy and often lie along the ground or curve up at the ends. The leaves are made up of 3 leaflets on a short stalk. They are 3-20 mm long by 2.5-12 mm wide. They are wedge shaped at the base. The leaves are hairy underneath. The flowers are yellow and pea like. The fruit is a curved, kidney shaped pod. It is 3 mm wide. It is black when ripe. There is one seed.
