颤喙马先蒿 chan hui ma xian hao

Herbs annual, 4--15 cm tall. Stems numerous, erect or flexuous, unbranched, pubescent. Basal leaf petiole 2--5 cm, pubescent; leaf blade lanceolate, 3--5 X 1--1.4 cm, fleshy, pinnatifid; segments 15--20 pairs, ovate, pinnatifid, dentate. Stem leaves only in 1 or 2 whorls, similar to basal leaves but smaller. Inflorescences spicate, interrupted basally, flowers in whorls of 3; bracts leaflike, longer than calyx. Calyx ca. 1 cm, slightly cleft anteriorly, pubescent; lobes 5, unequal, ca. as long as tube, posterior lobe smallest, posterior-lateral pair largest. Corolla purple; tube ca. 1 cm, glabrous; galea ± bent at a right angle, 5--6 mm, crested; beak horizontal or slightly decurved, 4--6 mm, slender; lower lip 7--8 mm, minutely ciliate. Filaments glabrous. Capsule cylindric, ca. 1 cm. Fl. Jun--Jul, fr. Jul--Aug.

* Shaded areas, valleys; 3000--4000 m. ?SE Xizang, NW Yunnan.