foc
《中国植物志》英文修订版
Flora of China
  FOC Vol.6 (2001)              | Family List  Ranunculaceae  PDF Batrachium  PDF   |  eFloras.org Link Font:+ Big | - Small
   4. Batrachium bungei  (Steudel) L. Liou
水毛茛   shui mao gen
  

  

Herbs perennial, submersed. Stems ca. 30 cm or more, branched, glabrous or sparsely puberulent on nodes. Petiole 4--12(--18) mm, glabrous or sheath abaxially sparsely puberulent; leaf blade flabellate or semiorbicular in outline, 1--2.5 × 1.8--3.5 cm, glabrous, 3-sect; segments 4 or 5 × sect, ultimate lobules filiform, soft, ± collapsing out of water. Flower 0.5--1.8 cm in diam. Pedicel 2.2--3.5 cm, glabrous. Receptacle conical in flower and fruit, puberulent. Sepals (4 or)5, elliptic, 1.6--5.5 mm, glabrous. Petals (4 or)5, white with yellow base or yellow throughout, obovate, 2.5--10 × 1.4--7 mm, apex rounded. Stamens 5--20; anthers oblong, ca. 1 mm. Aggregate fruit subglobose or broadly ovoid, 4--5 × 4--5 mm; achenes obliquely obovoid, 1.2--1.4 × ca. 1 mm, glabrous, with ca. 6 transverse wrinkles. Persistent style ca. 0.1 mm.

Ponds, lakes, streams, swamps; near sea level--4900 m. Gansu, N Guangxi, Hebei, SW Hubei, Hunan, N and S Jiangsu, Liaoning, E Qinghai, Shanxi, W and NW Sichuan, Xizang, NW Yunnan, Zhejiang [Kashmir].

  
1Petals yellow throughout4c  var. flavidum    黄花水毛茛
+Petals white with yellow base.(2)
   
2(1)Flowers 10--18 mm in diam.; stamens (12--)15--204a  var. bungei    水毛茛(原变种)
+Flowers 5--6 mm in diam.; stamens 5--74b  var. micranthum    小花水毛茛
   
  

水毛茛 Batrachium bungei