Herbs perennial, (20-)30-95(-115) cm tall. Rhizomes creeping, not scaly, slender or stout and with tuberous knots, 2-10(-30) mm in diam., not stoloniferous. Stems stout or slender, erect, simple or rarely branched above, glabrous, hirsute, or pilose. Rhizomal leaves (4-)10-40(-50) cm; petiole (1-)3-20(-25) cm; terminal leaflet lanceolate, elliptic, oblong, ovate, or obovate, (1-)2-15(-25) × (0.5-)1-3.5(-5) cm, sessile or petiolulate, base cuneate, margin serrate, crenate, dentate, or rarely 3-5-lobed, apex acuminate, acute, or subobtuse; lateral leaflets (1 or)2-6 pairs, similar to terminal but smaller. Cauline leaves 3-12(-18); petiole (1-)2-5(-6.5) cm, not auriculate at base; terminal leaflet narrowly ovate, lanceolate, elliptic, or oblong, rarely obovate or lanceolate-linear, (2-)4-12(-20) × 1-4(-5) cm, glabrous or pubescent, sessile or on a petiolule to 1 cm, base cuneate, margin ciliolate and crenate, serrate, or serrulate, rarely subentire or doubly serrate, apex acute, rarely acuminate; lateral leaflets 2-7(-11) pairs, sessile or petiolulate, base cuneate or obliquely decurrent, similar to but slightly smaller than terminal leaflet. Racemes 10-30-flowered. Fruiting pedicels ascending or rarely divaricate, (0.3-)0.8-2.5(-3.1) cm, straight, stout. Sepals oblong, 3.5-6.5(-8) × 1.5-3 mm. Petals purple or lilac, obovate or spatulate, (0.8-)1-1.7 cm × 3.5-8 mm, apex rounded or rarely subemarginate. Median filament pairs 7-9(-11) mm, lateral pair 6-7 mm; anthers oblong, 1-2(-2.5) mm. Ovules 8-12(-16) per ovary. Fruit linear, (2.2-)2.5-6(-7) cm × 1.5-2.5(-3) mm; gynophore 0.5-3 mm; valves smooth, sparsely pubescent or glabrous; style (1-)2-6.5(-9) mm. Seeds brown, ovoid or oblong, (1.5-)2-3(-4) × 1-1.7(-2) mm. Fl. (Mar-) Apr-Oct, fr. May-Oct. 2n = 64, 80, 96.
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A cabbage family herb. It grows 30-95 cm tall. It has creeping rhizomes or underground stems. The flower stems are erect and unbranched. The leaves are compound with leaflets along the stalk. The leaves are 7-10 cm long. There are 9-11 leaflets that are narrowly sword shaped and 3-8 cm long and up to 2 cm wide. There are teeth along the edge. The pod is narrow and 2-3.5 cm long and flattened. The seeds are oblong and 2 mm long. They are brown.
It is a temperate plant. It grows in damp forests, river banks, tundra, rock crevices, meadows, damp woodlands, thickets, stream sides, valleys, ravines, mountain slopes, among boulders between 500–4200 m altitude in China. In Northeastern India it grows between 3,500-4,000 m above sea level. It grows in wetlands. In Yunnan.
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Forests and streamsides, 2100-3600 metres from Pakistan to S.W. China, most common in the west of its range.
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