Herbs perennial, (9-)15-45(-55) cm tall, pilose or subhirsute. Rhizomes elongated, 1-3 mm in diam. Stems decumbent basally, erect, simple, ridged, pilose, 4-10-leaved. Basal leaves not rosulate, similar to cauline ones; lower and middle cauline leaves (1.5-)3-12(-15) cm; petiole 0.5-4 cm, ciliate, not auriculate at base; terminal leaflet broadly ovate or suborbicular, (3-)5-12(-15) × (2-)4-8(-10) mm, symmetrical, with a petiolule 1-3 mm, base obtuse, truncate, or cuneate, margin 2-4-toothed on each side, teeth submucronate; lateral leaflets alternate or rarely opposite, 6-12 on each side of rachis, broadly to narrowly ovate or ovate-lanceolate, subequaling terminal leaflet, asymmetric, sessile or with a petiolule to 3 mm, pilose or rarely subglabrous, base oblique, proximal margin coarsely and unequally (2 or)3-5(or 6)-toothed, distal margin entire or 1-3-toothed, acute apex and teeth submucronate. Racemes terminal, many flowered. Flowering pedicels divaricate or ascending, 1-2 cm, slender, pilose. Sepals oblong to narrowly ovate, (2.5-)3-4 × (1-)1.2-1.6 mm, margin membranous, base of lateral pair subsaccate. Petals white, obovate, 7-9 × 2.5-4 mm, cuneate into a clawlike base to 2 mm, apex rounded or subemarginate. Median filament pairs 4-5 mm, slightly dilated, not flattened; lateral pair 2.5-3.5 mm; anthers narrowly oblong, 1-1.5 mm. Ovules 10-14 per ovary. Fruit and seeds not seen. Fl. May-Jul.
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