瘠瘦马先蒿 ji shou ma xian hao

Herbs annual or biennial, 20--30 cm tall, glabrescent, scarcely drying black. Stems 6--12, ascending, often short branched apically, with lines of hairs. Leaves mostly on stem, alternate or pseudo-opposite; petiole to 1 cm or distal ones ± sessile, glabrescent; leaf blade ovate-elliptic to narrowly oblong, 3--5 X 1--1.5 cm, glabrous on both surfaces, abaxially sparsely whitish scurfy, pinnatisect; segments 5--7 pairs, ovate to lanceolate-oblong, incised-pinnatifid or double dentate. Inflorescences racemose, to 10 cm; bracts leaflike. Pedicel ca. 2 mm. Calyx 6--7 mm, glabrous, 1/3 cleft anteriorly; lobes 3, unequal, posterior one acicular, lateral pair larger, toothed. Corolla white, with reddish beak, 1.1--1.3 cm; tube erect, ca. 2 X as long as calyx; galea ± falcate, slightly crested, not twisted; beak straight, ca. 4 mm, slightly 2-cleft at apex, not ciliate; lower lip nearly as long as galea. Filaments glabrous. Capsule ovoid, ca. 1 cm X 5--6 mm. Seeds narrowly ovoid, ca. 2 mm. Fl. Jun--Jul, fr. Jul--Sep.

* Grassy slopes; ca. 2900 m. Sichuan, NW Yunnan.