Flora of China
  FOC Vol.6 (2001)              | Family List  Ranunculaceae  PDF Caltha  PDF   | Link Font:+ Big | - Small
   1. Caltha  Linnaeus
驴蹄草属   lu ti cao shu
Authors:Li Liangqian; Michio Tamura


Herbs perennial, glabrous, with fibrous roots. Stems simple or several branched. Leaves basal, or both basal and cauline, sometimes distal cauline ones palmately lobed, orbicular, reniform, or ovate, base cordate, margin dentate or entire; petioles sheathed at base. Flower solitary, terminal, or 2 or more in a simple or complex monochasium opening nearly flat. Sepals 5 or more, petaloid, yellow, rarely white or red, obovate or elliptic, caducous. Petals absent. Stamens numerous; anthers elliptic to oblong; filaments linear. Follicles 5--40, sessile, sometimes stipitate, with branching transverse veins, styles distinct or nearly absent; ovules several to many. Seeds several in a follicle, ellipsoid-globose, smooth.

About 15 species: temperate and cold-temperate regions of N and S hemispheres; four species (one endemic) in China.

1Stigmas nearly sessile; seeds less than 1 mm; sepals white or pinkish, ca. 3 mm; follicles (10--)20--304  C. natans    白花驴蹄草
+Styles distinct; seeds 1--2.5 mm; sepals yellow, rarely red, more than 7 mm; follicles 5--12.(2)
2(1)Follicles shortly stipitate3  C. scaposa    花葶驴蹄草
+Follicles sessile.(3)
3(2)Leaves both basal and cauline; flowers usually (2 or)3--5 or more in a complex monochasium1  C. palustris    驴蹄草
+Leaves all basal; flower solitary, terminal2  C. sinogracilis    细茎驴蹄草
   Lower Taxon
  • Caltha natans  Pallas  白花驴蹄草
  • Caltha palustris  Linnaeus  驴蹄草
  • Caltha palustris var. barthei  Hance  空茎驴蹄草
  • Caltha palustris var. himalaica  Tamura  长柱驴蹄草
  • Caltha palustris var. membranacea  Turczaninow  膜叶驴蹄草
  • Caltha palustris var. sibirica  Regel  三角叶驴蹄草
  • Caltha palustris var. umbrosa  Diels  掌裂驴蹄草
  • Caltha scaposa  J. D. Hooker & Thomson  花葶驴蹄草
  • Caltha sinogracilis  W. T. Wang  细茎驴蹄草
  • Caltha palustris var. palustris    驴蹄草(原变种)