Pedicularis myriophylla Pall.

Herbs annual, to 40 cm tall, not drying black. Roots conical, slender. Stems usually single, branched throughout, with 4 lines of hairs. Basal leaves withering early. Stem leaves in whorls of (3 or)4, rarely opposite; petiole to 1 cm; leaf blade lanceolate-oblong, ca. 3 X 1 cm, both surfaces glabrous, pinnatisect; segments 10--13 pairs, linear-lanceolate, pinnatipartite, few toothed. Inflorescences racemose, sometimes interrupted basally; proximal bracts leaflike. Pedicel elongating to 2.5 mm in fruit. Calyx to 7 mm, glabrous, ca. 1/3 cleft anteriorly; lobes 5, slightly unequal, triangular, ± entire, ciliate. Corolla rose or purple, ca. 1.4 cm; tube equal to or longer than calyx, erect basally, slightly bent and expanded apically; galea barely bent apically, much wider than tube; beak pointing outward, not prominent, less than 1 mm; lower lip ca. 5 X 5 mm. Anterior filament pair villous, posterior pair glabrescent. Capsule lanceolate-ovoid, ca. 1.5 cm, apex acuminate. Fl. Jun--Jul, fr. Jul--Aug.

Forest clearings, meadows. NW Hebei, Xinjiang [Mongolia, Russia (Siberia)]

Pedicularis myriophylla là loài thực vật có hoa thuộc họ Cỏ chổi. Loài này được Pall. mô tả khoa học đầu tiên năm 1776.

万叶马先蒿（学名：Pedicularis myriophylla），又名轮叶马先蒿，是列当科马先蒿属的植物。分布在蒙古、俄罗斯以及中国大陆的新疆等地。