Plants sparsely to moderately pubescent. Stems 5-12 dm. Cauline leaves: petiole narrowly winged, base auriculate or not; blade 9-17-foliolate, 3-10 cm; lateral leaflets sessile, rachis narrowly winged, blade about same size as terminal; terminal leaflet blade linear to narrowly oblong or lanceolate, 0.5-2.5 cm × 2-8(-10) mm, base decurrent with adjacent pair of leaflets, margins often dentate, rarely sinuate-repand, apex acute. Fruiting pedicels divaricate or descending, straight, 9-25 mm. Flowers: sepals 3-4 × 1-1.5 mm; petals white, spatulate or oblanceolate, 6-8 × 2-2.5 mm, (base to 2 mm), apex obtuse to acute; filaments 5-7 mm; anthers 1-1.2 mm. Fruits 2-3 cm × 1-1.2 mm; ovules 24-40 per ovary; style 1-2.5 mm. Seeds uniseriate, reddish brown, ovate, 1-1.2 × 0.6-0.8 mm, minutely reticulate with 300-450 areolae on each side.
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