丝叶唐松草 si ye tang song cao

Isopyrum trichophyllum H. Léveillé, Repert. Spec. Nov. Regni Veg. 9: 224. 1911.

Plants 10--80 cm tall, glabrous. Stems branched or simple. Basal leaves 2--6, 5--18 cm; petiole 1.5--9 cm; leaf blade 2--4-ternate, 2.5--10 cm; leaflet blade subulate, linear, or narrowly linear, 0.6--3 × 0.5--1.5 cm, thinly leathery, margin recurved, apex acute. Cauline leaves 2--4, similar to basal leaves. Inflorescence cymose, flat topped. Pedicel slender, 20--45 mm. Sepals 4, pinkish or white, elliptic or narrowly obovate; 6--10 × 3--5 mm. Stamens 2.8--3 mm; filament filiform, short; anther oblong, ca. 2 mm, apex mucronate. Carpels 7--11; style short. Achenes sessile; body fusiform, 3.5--4.5 mm; veins 8--10. Fl. Jun--Jul.

* Slopes, meadows, damp rocky ledges; 600--1000 m. Gansu, Hebei, Liaoning, Shaanxi, Shanxi.