双生马先蒿 shuang sheng ma xian hao

Herbs annual, to 15 cm tall, not drying black. Stems woody, whitish pubescent. Leaves 1--3 pairs, opposite; petiole to 1.5 cm basally, whitish long pubescent; leaf blade 1--1.8 cm X 5--8 mm, pinnatipartite; segments 5--8 pairs, narrowly oblong, incised-dentate. Inflorescences 3--6-flowered; bracts leaflike. Pedicel ca. 2 mm. Calyx tube 5--8 mm, membranous, whitish villous along veins; teeth unequal, ciliate. Corolla purplish red, with ± yellow galea basally; tube straight, ca. 1.4 cm, to more than 2 X as long as calyx tube, pubescent; galea falcate, nearly as long as tube; beak ca. 3.5 mm; lower lip ca. 1.1 X 1.8 cm, ciliate, middle lobe broadly ovate, hoodlike at apex. 2 filaments villous, 2 glabrous. Fl. Aug, fr. Sep.

* Alpine meadows; ca. 4000 m. N Sichuan.