Flora of China
  FOC Vol.6 (2001)              | Family List  Ranunculaceae  PDF Caltha  PDF   | Link Font:+ Big | - Small
   1. Caltha palustris  Linnaeus
驴蹄草   lu ti cao


Plants with numerous fleshy roots. Stems 10--120 cm tall at fruiting, (1.5--)3--12 mm in diam., branched, rarely simple, basal leaves 3--7, long petiolate; petiole (4--)7--24 cm; leaf blade orbicular to orbicular-reniform or cordate, (1.2--)2.5--5 × (2--)3--9 cm, base deeply cordate, margin densely denticulate, apex rounded. Cauline leaves usually diminishing upward, rarely equal to basal leaves in size, orbicular-reniform or triangular-cordate, shortly petiolate or uppermost ones sessile. Monochasium often solitary, (2 or)3--5-flowered; pedicels more than 1.5 cm at fruiting. Flowers 2--3 cm in diam. Sepals 5, yellow, obovate to narrowly obovate, 1--1.8(--2.5) × 0.6--1.2(--1.5) cm, apex rounded. Stamens 4.5--7(--9) mm; anthers sessile, oblong, 1--1.6 mm. Follicles (5--)7--25, ca. 1 cm × 3 mm; persistent style 1--3 mm. Seeds black, rarely pale greenish brown, narrowly ovoid, 1.5--2 mm. Fl. May--Sep. 2n = 16, 32, 55--57, 60, 64, 80.

Mountain regions, grassy slopes, valleys, marshlands, forests, by streams, in water; 600--4000 m. S and SW Gansu, Guizhou, Hebei, Heilongjiang, W Henan, Jilin, Liaoning, Nei Mongol, Shanxi, Sichuan, Xinjiang, E and SE Xizang, C and NW Yunnan, Zhejiang [most temperate regions of N hemisphere].

1Uppermost cauline leaves and bracts palmatipartite1e  var. umbrosa    掌裂驴蹄草
+Uppermost cauline leaves and bracts undivided.(2)
2(1)Stems to 120 cm tall, ca. 12 mm in diam. at fruiting; cauline leaves below inflorescence subequal to basal leaves in size1f  var. barthei    空茎驴蹄草
+Stems to 50 cm tall, ca. 6 mm in diam. at fruiting; leaves below inflorescence usually smaller than basal leaves.(3)
3(2)Stem decumbent after anthesis; leaf blades broadly triangular-reniform, broadly cordate at base, margin dentate basally, repand or subentire apically1c  var. sibirica    三角叶驴蹄草
+Stem erect; leaf blades orbicular-reniform or suborbicular, rarely triangular-reniform, usually deeply cordate at base, margin dentate throughout.(4)
4(3)Styles 2--3 mm1d  var. himalaica    长柱驴蹄草
+Styles 1(--1.5) mm.(5)
5(4)Leaves herbaceous or subpapery; pedicels 2--10 cm1a  var. palustris    驴蹄草(原变种)
+Leaves thin herbaceous or membranous; pedicels to 14 cm1b  var. membranacea    膜叶驴蹄草