细叶白头翁 xi ye bai tou weng

Pulsatilla turczaninovii f. albiflora Y. Z. Zhao.

Plants 15--25 cm tall. Leaves 4 or 5, expanding after anthesis; petiole 5--8 cm, with long pilose hairs; leaf blade narrowly elliptical, sometimes ovate, 7--8.5 × 2.5--4 cm, with (3 or) 4 pairs of lateral leaflets, 3 × pinnately divided, abaxially sparsely with hairs, adaxially glabrous; segments ovate, terminal lobes linear-lanceolate to linear, sometimes ovate, 1--1.5 (--2.5) mm wide, margin revolute, apex acute; lower segments petiolulate, upper segment sessile. Scapes ca. 1.5 cm, elongated to 15 cm in fruit, with hairs; involucral bracts 2.8--3.4 cm, basally connate into a 5--6 mm tube, apically finely divided, lobes linear to linear-lanceolate, 1--1.5 mm wide, abaxially puberulent. Sepals blue-violet, rarely white, erect, ovate-oblong to elliptical, 2.2--4.2 × 1--1.3 cm, abaxially puberulent, apex slightly acute to blunt. Anthers yellow. Infructescences ca. 5 cm in diam. Achenes ca. 4 mm, thickly puberulent. Persistent styles 4--5 cm. Fl. May--Jun, fr. Jun--Jul.

Grassy slopes. N Hebei, W Heilongjiang, W Jilin, W Liaoning, Nei Mongol, Ningxia, N Xinjiang [Mongolia, Russia (Far East, Siberia)].

This species is used medicinally.