反曲马先蒿 fan qu ma xian hao

Herbs perennial. Roots clustered, fibrous. Stems ascending, 38--80 cm tall, glabrous and purple tinted basally. Basal leaves withering early. Stem leaves alternate; petiole to 5 cm, distal ones shorter; leaf blade oblong-lanceolate, 3.5--8 X ca. 3 cm, glabrous, pinnatisect; segments 9--11 pairs, ovate to lanceolate, lobulate or double dentate. Inflorescences 5--27 cm, lax; bracts linear-lanceolate, ciliate. Calyx ca. 2.5 X 2 mm, slightly cleft anteriorly; lobes 5, triangular, ± equal, densely ciliate, entire. Corolla pale red; tube ca. 3.5 mm, exceeding calyx; galea strongly bent, apex with several dark purple spots; lobes of lower lip unequal, apex ± acute. Capsule ovoid, ca. 9 X 6.5 mm. Fl. Aug, fr. Aug--Sep.

* Boulders, rock walls; 3300--3400 m. SW Gansu, W Sichuan.