Description from Flora of China
Herbs annual, 30(--50) cm tall, not drying black. Roots ± woody. Stems several, short branched throughout, ± woody at anthesis, with 4 lines of hairs. Basal leaves withering. Stem leaves in whorls of 4, proximal ones to 1.5 cm, distal ones only 1.5--4 mm; leaf blade oblong-lanceolate to ovate-oblong or linear, to 2--4.5 X 0.9--1.7 cm, glabrescent on both surfaces, pinnatisect; segments 6--10 pairs, widely spaced, ovate-lanceolate to linear-lanceolate, incised-dentate. Flowers in ± interrupted racemes, to 20 cm; bracts shorter than flowers, proximal ones leaflike. Pedicel short. Calyx ca. 1.1 cm, barely 1/3 cleft anteriorly; lobes 5, unequal, slightly ciliate, pinnatifid to serrate. Corolla yellow or white, ca. 2 cm; tube strongly bent in calyx, expanded apically; galea slightly bent apically, indistinctly crested; beak slightly bent downward, 2.5--3 mm; lower lip ca. 8 mm X 1.3 cm. Filaments pubescent. Fl. Jun--Jul, fr. Jul--Aug.
* Open slopes; ca. 1600 m. N, SE, and SW Gansu, N Hebei, E Nei Mongol, N Shaanxi