Stems (40-)60-120(-180) cm; base usually reddish, glabrous to puberulent. Leaves mostly cauline at anthesis; basal leaves 0(-3) at anthesis; cauline leaves 5-12 at anthesis; petiole 0.5-17 cm. Leaf blade ± pentagonal, 4-8 × 7-16 cm, margins ± incised, nearly glabrous; ultimate lobes 0-9, width 15-30 mm (basal), 5-20 mm (cauline), widest at middle or in proximal 1/2. Inflorescences (5-)14-40(-75)-flowered, ± open, at least 2 times longer than wide; pedicel 1-4(-9) cm, puberulent to glabrous; bracteoles (2-)6-12 mm from flowers, green, linear, 5-9(-14) mm, puberulent. Flowers: sepals dark blue, glabrous, lateral sepals spreading, (8-)14-21 × 5-9 mm, spurs straight or downcurved at apex, within 20° of horizontal, (10-)16-23 mm; lower petal blades covering stamens, 5-10 mm, clefts 1.5-3 mm; hairs sparse, mostly near junction of blade and claw, centered or on inner lobes, well dispersed, yellow. Fruits (15-)23-34 mm, 3.8-5.5 times longer than wide, glabrous. Seeds unwinged; seed coats smooth. 2 n = 16.
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