Herbs annual or biennial. Roots slender, with sparse lateral rootlets. Flowering stems spreading, ascending, or erect, dichotomously branched, 20–50 cm tall, together with petioles pilose or glabrescent. Radical leaves 4–15 cm including petiole; stipules brown, membranous, abaxially pilose or glabrescent; leaf blade 3-foliolate or pinnate with 2–5 pairs of leaflets; leaflets alternate or opposite, sessile, or terminal leaflet shortly petiolulate or subsessile, both surfaces green, oblong or obovate-oblong, 1–2.5 × 0.5–1.5 cm, both surfaces pilose or glabrescent, base cuneate or broadly so, often decurrent and adnate to rachis in apical 1 or 2 pairs of leaflets, margin obtusely serrate, incised serrate, or 2-or 3-parted, apex obtuse or acute; cauline leaves resembling radical ones but pairs of leaflets fewer higher up stem; stipules green, herbaceous, margin entire, serrate, or parted. Inflorescence terminal, corymbose-cymose, with axillary flowers on lower part of flowering stem. Flowers 6–8 mm in diam.; pedicel 0.8–1.5 cm, densely pubescent. Sepals triangular-ovate, apex acute; epicalyx segments oblong-elliptic or elliptic-lanceolate, nearly equaling or slightly longer than sepals, apex acute. Petals yellow, obovate, slightly shorter than sepals, apex emarginate. Style subterminal, base thickened, papillate; stigma dilated. Achenes cylindric, rugose, apex acute. Fl. and fr. Mar–Oct.
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Spreading annual or biennial herb, branches up to 200 mm long. Leaves 3-foliolate or pinnate with 2-5 pairs of leaflets, pilose or glabrescent, margin obtusely serrate. Flowers in a terminal cyme and axillary in lower parts of stem, petals shorter than sepals, yellow, notched. Achenes wrinkled, apex acute.
Annual or short-lived perennial herb. Stems spreading; flowering stems up to 400 mm high. Leaves compound; blade imparipinnate; leaflets oblong or obovate, incise-dentate. Flowers: petals 2.5-3.0 mm long, shorter than sepals; corolla yellow; Oct.-Jun.
Annual or short-lived perennial herb. Flowering stems up to 400 mm tall. Leaflets oblong or obovate, incise-dentate. Petals 2.5-3.0 mm, shorter than sepals. Flowers yellow.
A herb. It grows for one or two years. The flowering stems can be 20-50 cm tall. The leaves are hairy. The flowers are yellow.
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