Stems simple to many from base, (0.5-)1-3.5(-5.5) dm, hirsute or puberulent basally, often glabrous distally. Basal leaves: petiole (0.3-) 0.8-1.5(-2) cm; blade oblong to oblanceolate in outline, (1-)1.5-7(-10) cm × 4-20(-30) mm, margins pinnatifid to pinnatisect; lobes (4-)6-12(-15) per side, ovate or oblong to linear, margins often coarsely dentate proximally, entire or minutely dentate distally, larger distally; terminal lobe equal to or larger than lateral, margins entire or laterally 1-toothed, surfaces usually pubescent, rarely glabrate. Cauline leaves shortly petiolate; blade smaller, narrower, (lobe) margins entire. Racemes lax in fruit. Fruiting pedicels straight, (1.5-) 2.5-6(-8) mm, glabrous. Flowers: sepals 1-2 × 0.5-0.8 mm, glabrous or subapically with few hairs; petals 2-3 × 0.5-1 mm; filaments 1.5-2 mm; anthers 0.3-0.4 mm. Fruits divaricate-ascending, (1-)1.5-2.5(-3.2) cm × 1-1.5 mm, slightly torulose; style 0.2-0.7 mm. Seeds orbicular or suborbicular, 1-1.2 × 0.9-1 mm; wing 0.1-0.15 mm. 2n = 16.
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