箭头唐松草 jian tou tang song cao

Plants 50--100 cm tall, glabrous or glandular pubescent. Stems simple or proximally branched, smooth. Cauline leaves erect, proximal ones ca. 20 cm including petiole; leaf blade 2-pinnate; leaflet blade cuneate, narrowly so, orbicular-rhombic, broadly rhombic-ovate, or obovate, 2--4 × 1.4--4 cm, base narrowly cuneate to rounded, margin 3-lobed; lobes crenate, apex rounded, obtuse, or acute; veins raised abaxially. Distal cauline leaf blade small; leaflet blade cuneate-obovate, obovate, or orbicular, base obtuse or cuneate, apex acute. Inflorescence paniculate, 9--30 cm. Pedicel 1--7 mm. Sepals 4, early deciduous, narrowly elliptic, ca. 2.2 mm. Stamens ca. 15; filament filiform; anther narrowly oblong, ca. 2 mm, apex mucronate. Carpels 3--6; stigma broadly triangular. Achenes sessile; body narrowly ovoid or narrowly ellipsoid, ca. 2 mm; veins ca. 8. Fl. Jul.

Slopes, grasslands, wet meadows, rocky ledges; 900--2400 m. Gansu, Hebei, Heilongjiang, Hubei, Jilin, Liaoning, Nei Mongol, Qinghai, Shaanxi, Shanxi, Sichuan Xinjiang [Japan, Korea, Mongolia, Russia (Siberia); C and SW Asia, Europe].

This species is used medicinally.