foc
《中国植物志》英文修订版
Flora of China
  FOC Vol.6 (2001)              | Family List  Ranunculaceae  PDF Dichocarpum  PDF   |  eFloras.org Link Font:+ Big | - Small
   22. Dichocarpum  W. T. Wang & P. K. Hsiao
人字果属   ren zi guo shu
  
Authors:Fu Dezhi; Orbélia R. Robinson

  

Herbs perennial, erect. Rhizomes present. Stem scapoid, unbranched or few branched, with few leaves or leafless. Leaves basal or basal and cauline, pedately compound, 3--13-foliolate, rarely simple; central leaflet entire. Inflorescences cymose, terminal or axillary, 1--8-flowered; bracts usually 3-lobed. Flowers radially symmetric, bisexual, sometimes cleistogamous. Sepals 5, petaloid, usually white, seldom yellowish or pinkish. Petals 5, golden-yellow, much smaller than sepals, clawed. Stamens 5--25; filaments narrowly linear, 1-veined; anthers yellow. Pistils 2, connate at base; ovary narrowly oblong, many ovuled; styles persistent. Follicles 2, divaricate, apically beaked. Seeds nitid, sometimes somewhat rugose or rough.

About 15 species: China, N India, Japan, N Myanmar, Nepal; 11 species (endemic) in China.

  
1Rhizome inconspicuous; tap root long; petals funnelform; seeds ellipsoid-fusiform11  D. fargesii    纵肋人字果
+Rhizome 1--16 cm; tap root inconspicuous; petals flat (petals unknown in D. basilare, D. carinatum, and D. hypoglaucum); seeds globose to subglobose, rarely ellipsoid.(2)
   
2(1)Stem leaves present.(3)
+Stem leaves absent.(6)
   
3(2)Central leaflet rhombic to broadly rhombic-ovate, 1.8--6 × 1.5--5 cm7  D. auriculatum    耳状人字果
+Central leaflet suborbicular, suborbicular-obovate, flabellate, or flabellate-obovate, 0.5--2.3 × 0.6--2.5 cm.(4)
   
4(3)Stamens 5 or 1010  D. arisanense    台湾人字果
+Stamens 20--45.(5)
   
5(4)Central leaflet suborbicular-obovate to flabellate-obovate; flowers 1.1--2.3 cm in diam.8  D. sutchuenense    人字果
+Central leaflet suborbicular to subflabellate; flowers 0.4--0.6 cm in diam.9  D. franchetii    小花人字果
   
6(2)Leaves 3-foliolate or sometimes simple; rhizome to 16 cm1  D. trifoliolatum    三小叶人字果
+Leaves (3)5--15-foliolate; rhizome 1--10 cm(7)
   
7(6)Leaves 5-foliolate, rarely 3-foliolate2  D. basilare    基叶人字果
+Leaves 7--15-foliolate.(8)
   
8(7)Rhizome 5--10 cm.(9)
+Rhizome 2--3(--5) cm.(10)
   
9(8)Leaflets abaxially pruinose; seeds inconspicuously ridged, smooth3  D. hypoglaucum    粉背人字果
+Leaflets abaxially not pruinose; seeds conspicuously ridged, rugose6  D. carinatum    种脐人字果
   
10(8)Central leaflet lanceolate5  D. malipoenense    麻栗坡人字果
+Central leaflet not lanceolate.(11)
   
11(10)Central leaflet rhombic4  D. dalzielii    蕨叶人字果
+Central leaflet suborbicular, suborbicular-obovate, flabellate-obovate, or subflabellate.(12)
   
12(11)Central leaflet suborbicular-obovate to flabellate-obovate; flowers 1.1--2.3 cm in diam.8  D. sutchuenense    人字果
+Central leaflet suborbicular to subflabellate; flowers 0.4--0.6 cm in diam.9  D. franchetii    小花人字果
   
   List of lower taxa