Herbaceous perennial; stems sparsely to moderately hairy, erect, branched from base. Leaflets 8-15, usually ± glabrous above, sparsely to moderately sericeous below, narrowly elliptic to oblanceolate, acute to acuminate, 30-130 × (5)-10-30 mm; stipules oblong-lanceolate, 15-35 mm long. Infl. 15-60 cm long, many-flowered; peduncle up to 15 cm long. Lower fls alternate; upper fls subverticillate; pedicels 5-14 mm long. Calyx densely hairy; upper lip shallowly 2-toothed; lower lip slightly longer, entire. Corolla blue, purple, orange, yellow, pink or white, often of 2 colours, not or slightly scented, 12-20 mm long. Pod densely villous, 5-10-seeded, 30-50 mm long; seeds ellipsoid, smooth, dark brown and somewhat mottled, c. 2 mm long.
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A herb. It keeps growing from year to year. It grows 0.5-1.5 m tall. The leaves have 10-14 leaflets. The leaflets are 4-11 cm long by 1-2 cm wide. The pods are 4 cm long y 1 cm wide.
Usually found in wetland; at elevations from sea level to 3,000 metres. Commonly found in a variety of habitat types including seasonally dry to marshy meadows, wetlands and damp forests, along stream banks and ditches, and in disturbed areas.
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It is a temperate plant. In Argentina it grows between 500-1,500 m above sea level.
Can be grown by cuttings or seedlings. Seeds needs soaking.
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