丝叶毛茛 si ye mao gen

Ranunculus affinis R. Brown var. capillaceus Franchet, Pl. Delavay. 19. 1889; R. affinis var. filiformis Finet & Gagnepain; R. altaicus E. G. Laxmann var. sulphureus Finet & Gagnepain; R. tanguticus (Maximowicz) Ovczinnikov var. capillaceus (Franchet) L. Liou.

Herbs perennial. Roots fibrous, subequally thick. Stems 20--30 cm, glabrous, branched. Basal leaves 1--4; petiole 3--7 cm, glabrous; blade 3-sect, obovate-flabellate, 2.5--3.2 × 3--3.5 cm, papery, glabrous; segments petiolulate, 2 to 3 × dichotomously dissected, ultimate lobules narrowly linear or filiform. Stem leaves smaller, short petiolate or subsessile. Compound monochasium terminal, corymbose; bracts leaflike. Flowers 0.7--1.1 cm in diam. Pedicel 0.6--2 cm, sparsely appressed puberulent above. Receptacle puberulent. Sepals 5, elliptic or obovate, 2--3.5 mm, abaxially sparsely appressed puberulent, glabrescent. Petals 5, obovate or narrowly obovate, 3--6.2 × 1.6--3 mm, nectary pit without a scale, apex rounded. Stamens numerous; anthers oblong. Aggregate fruit ovoid, 3--4 × 2--3 mm. Achene slightly bilaterally compressed, broadly obliquely obovoid, 1--1.2 × ca. 1 mm, puberulent; style persistent, ca. 0.5 mm. Fl. Jun--Sep.

* Moist grassy places, by streams; 2500--2900 m. NW Yunnan.