盔须马先蒿 kuei xu ma xian hao

Herbs perennial. Stems 35--40 cm tall, erect, unbranched, hispid. Leaves sessile, linear-lanceolate, 5--6.5 cm X 6--8 mm, adaxially glabrous except for pubescent midvein, base broadly auriculate, margin crenate, apex acute. Inflorescences long racemose, 10--17 cm, ± dense; bracts leaflike, upper ones ca. 2/3 longer than corolla. Pedicel 1--2 mm. Calyx oblong-ovate, ca. 1.2 cm; lobes 5, ± equal, ciliate, ± entire. Corolla yellow, ca. 3 cm; tube erect, ca. 1.5 X as long as calyx; galea ca. 1.4 cm, margin densely long pubescent; beak 2--4 mm, apex cleft; lower lip nearly as long as galea, lobes ± rounded. Upper filament pair densely hirsute in distal half, lower pair glabrous except for few hairs just below anther. Fl. Jun, fr. Jul.

* In Salix scrubs; 4300--4700 m. W Sichuan.