Herbs perennial. Rhizome robust, with dense white rootlets. Stem erect, usually simple, 30-40 cm tall, puberulous, without leaves in lower part but stipulate. Lower stipules elliptic-lanceolate, membranous, base amplexicaul, margin usually remotely serrulate; upper ones lanceolate, margin usually pinnatifid, apex acute, adnate to petioles at base; petiole short; blade lanceolate or broadly lanceolate, 5-12 × 1.2-5 cm, abaxially subglabrous or puberulous along veins, veins reaching margin, adaxially and along margin sparsely puberulous, base cuneate, decurrent to petiole, margin remotely serrate, apex acute. Flowers solitary in leaf axils, purple, small; pedicels shorter than leaves, with 2 bracteoles at or above middle. Sepals narrowly lanceolate, apex acuminate, basal auricles short, apex truncate. Petals subequal, obovate-spatulate, apex rounded, lateral ones bearded, anterior one ca. 1.3 cm (spur included); spur straight, short, ca. 2 mm, apex obtuse. Ovary glabrous; styles clavate, slightly curved forward at base, apex uncinate and papillose. Capsule oblong, 1.2-1.5 cm, smooth, glabrous, apex acute. Seeds yellow, narrowly ovoid. Fl. May, fr. Jun-Aug.
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