休氏马先蒿 xiu shi ma xian hao

Herbs perennial, barely to 9 cm tall, drying black. Stems several, often ascending, pubescent. Basal leaves numerous; petiole to 4 cm; leaf blade oblong-elliptic to elliptic, ca. 3 X 1.6 cm, pinnatisect; segments 4 or 5 pairs, ovate-elliptic, incised-dentate. Stem leaves opposite, similar to basal leaves but smaller and shorter petiolate. Inflorescences short or ± elongated, often interrupted basally, few flowered. Calyx 0.9--1.1 cm, sparsely long pubescent; tube ca. as long as lobes; lobes 5, unequal, leaflike. Corolla purple-red, with dark purple galea, ca. 2.5 cm; tube falcate apically, ca. 1.6 cm, sparsely pubescent; galea barely straight, ca. 9 mm, apex rounded, marginally 2-toothed; lower lip slightly longer than galea, ca. 1.1 X 1.1 cm. 2 filaments pubescent, 2 glabrous. Fl. Jun.

* Open earthy slopes; 4100--4300 m. SE Xizang.