Herbs perennial, 20--100 cm tall, sparsely pubescent, not drying black. Roots ± fleshy, fusiform. Stems 1 to several, erect, unbranched, hollow, with lines of whitish hairs. Basal leaves clustered, withering in fruit, 10--45 cm; petiole to 27 cm; leaf blade narrowly lanceolate, to 25 X 6 cm, pinnatisect; segments to 25 pairs, lanceolate, pinnatipartite, dentate, teeth callose. Stem leaves smaller than basal leaves, distal ones shorter petiolate. Inflorescences long spicate, more than 20 cm; proximal bracts leaflike, distal ones 3-lobed. Calyx campanulate, to 1.3 cm, sparsely long pubescent, slightly cleft anteriorly; lobes 5, triangular, wider than long, 2 pairs of lateral lobes connected, ± triangular, ciliate. Corolla yellow; tube 1.3--1.6 cm; galea falcate apically, to 1.4 cm; beak distinct, ca. 3 mm, longer than wide, apex 2-cleft, lobes toothlike; lower lip ca. as long as galea, erose-dentate. Filaments pubescent. Capsule 1--1.5 cm. Seeds long ovoid. Fl. Jun--Jul, fr. Jul--Aug.
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