Herbs perennial, more than 1 m tall. Stems branched apically or unbranched, usually shiny black, pubescent. Leaves clasping, lanceolate, 2.5--8 X 0.5--2.4 cm, abaxially sparsely white pubescent, adaxially brown pubescent along midvein, pinnatipartite; segments 18 pairs, lanceolate-oblong, margin double dentate. Inflorescences long racemose, to more than 20 cm, interrupted basally; bracts leaflike. Pedicel to 3 mm, glabrous. Calyx 5--6 mm, glabrous; lobes 5, triangular, entire. Corolla pale yellow, to 1.5 cm; tube ca. 1.1 cm, glabrous or sparsely pubescent on outside; galea usually falcate, margin densely bearded; lower lip ± sessile, ca. as long as galea, ciliate. Filaments pubescent. Fl. Jun--Jul, fr. Aug--Sep.
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