Pedicularis triangularidens Tsoong

Herbs annual, (6--)40 cm tall, not drying black. Roots ± woody. Stems usually numerous, cespitose, unbranched to many branched basally and unbranched apically, densely pubescent to glabrescent. Leaves in whorls of 4. Basal leaf petiole to 2.5 cm, sparsely pubescent. Stem leaf petiole barely 0.5--1.5 cm; leaf blade ovate to linear-oblong or ovate-oblong, 2--3.5 X 0.7--1.8 cm, abaxially long pilose along midvein, adaxially sparsely appressed-pubescent, pinnatifid; segments 3--9 pairs, rounded, margin double dentate. Inflorescences spicate, 2--8(--20) cm, interrupted basally; proximal bracts leaflike, rhomboid-lanceolate or ± flabellate, white villous. Calyx (3.5--)4--5.5 mm, membranous, slightly cleft anteriorly; lobes 5, unequal, villous along veins, ciliate. Corolla pale purple-red, (0.9--)1.3--1.7 cm; tube 7--8 mm, ± bent at a right angle basally, expanded apically; galea nearly straight, 3.5--5.5 mm, slightly rounded in front, apex truncate; lower lip 6--9 X 7.5--10.5 mm, lobes ± obovate; middle lobe narrowly obovate, smaller than lateral pair, finely glandular ciliate. Filaments glabrous. Capsule triangular-lanceolate, 1--1.5 cm, apex acute. Fl. May--Jul, fr. Jul--Aug.

C, N, and NW Sichuan

* Forests, grassy slopes, river banks, moss-covered forest floor, coniferous forests; 2600--3800 m.

Pedicularis triangularidens là loài thực vật có hoa thuộc họ Cỏ chổi. Loài này được Tsoong mô tả khoa học đầu tiên năm 1963.

三角齿马先蒿（学名：Pedicularis triangularidens）是列当科马先蒿属的植物，是中国的特有植物。分布在中国大陆的四川等地，生长于海拔2,640米至3,810米的地区，多生长于树林及草坝中，目前尚未由人工引种栽培。