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
   1. Batrachium pekinense  L. Liou
北京水毛茛   bei jing shui mao gen
  

Ranunculus pekinensis (L. Liou) Luferov.

  

Herbs perennial, submersed. Stems 30 cm or more, branched, glabrous or sparsely puberulent on nodes. Petiole 3.5--14 mm, glabrous or sheath abaxially sparsely puberulent, base narrowly vaginate; leaf blades dimorphic: submerged blades finely 3 or 4 × divided with filiform segments; floating leaves flabellate or broadly cuneate, 1--3 × 1.2--3.5 cm, glabrous, 3-partite or 3-sect, segments 1--3(--4) × partite, ultimate lobules lanceolate-linear. Flower 1--1.3 cm in diam. Pedicel 2--4 cm, glabrous. Receptacle conical in flower and fruit, puberulent. Sepals 5, ovate-elliptic, 3.5--4 mm, glabrous. Petals 5, white with yellow base, obovate, 5--6.5 × 3--5 mm, apex rounded. Stamens 22--25; anthers oblong, ca. 1 mm. Aggregate fruit broadly ovoid, 3--4 × 4--5 mm; achenes obliquely obovoid, 1--1.2 × ca. 0.8 mm, with 7 transverse wrinkles. Persistent style ca. 0.1 mm. Fl. May--Aug, fr. Jul--Sep.

* Streams in valleys; 100--500 m. Beijing.