三角叶马先蒿 san jiao ye ma xian hao

Herbs annual or biennial, 8--20 cm tall, densely gray pubescent throughout, drying ± black. Stems erect, single or many branched basally, sometimes branched apically; branches slender, rigid, hollow. Leaves opposite or in whorls of 3 or 4, petiolate or distal ones sessile; petiole to 5 mm, villous; leaf blade triangular or triangular-ovate, 0.8--1.2 cm X 6--8 mm, abaxially rust colored and gray scurfy, adaxially glabrescent, pinnatifid; segments 4 or 5 pairs, broadly ovate, margin double dentate. Inflorescences racemose, to 9 cm, many flowered; bracts leaflike, ca. as long as calyx. Pedicel 3--4 mm, slender, villous. Calyx 8--10 mm, pubescent; lobes 5, unequal. Corolla rose, 1.7--2.2(--2.4) cm; tube erect, ca. as long as calyx; galea falcate apically, with 1 marginal tooth on each side; lower lip shorter than galea, slightly praemorse, middle lobe larger than lateral pair. Filaments sparsely pubescent basally. Capsule obliquely lanceolate, ca. 1.2 cm. Fl. Aug--Sep, fr. Sep--Oct.

* Grassy slopes; 2600--3500 m. SW Sichuan, NW Yunnan.