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Character/Data Set Information
Interactive Key for genera of Chinese Gymnosperms
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Interactive key for the Genera of Chinese Gymnosperms (by Xiangying Wen)
Character List
1: Habit [Unordered List]
2: Sexuality [Unordered List]
3: Stems [Unordered List]
4: Branchlets [Unordered List]
- 1. arranged in a plane (4 taxa)
- 2. spreading or ascending or drooping (3 taxa)
- 4. prominently jointed (2 taxa)
- 7. subopposite or subwhorled (3 taxa)
- 8. base with leaf scars or bud scales (8 taxa)
- 10. dimorphic (long and short branchlets) (4 taxa)
- 11. longitudinally grooved (2 taxa)
5: Branches [Unordered List]
- 2. irregularly whorled (6 taxa)
- 4. with orbicular scars of deciduous branchlets (1 taxon)
- 5. spreading or trooping (4 taxa)
6: Important diagnostics [Unordered List]
- 1. with reddish brown to dark gray bark (1 taxon)
- 2. with pyramidal or ovoid or columnar crown (1 taxon)
- 3. with sessile or subsessile leaves (1 taxon)
- 5. with inflexed and coiled new leaves (1 taxon)
- 6. with twisted leaf bases (6 taxa)
- 7. with keeled lateral leaf surfaces (2 taxa)
- 8. with trimorphic leaves (2 taxa)
- 9. with 2-lobed or notched leaf apex (1 taxon)
- 12. with an abaxial resin gland (2 taxa)
- 13. with monopodial trunk (2 taxa)
- 14. both sides of leaves with deep furrow (1 taxon)
7: Leaves: Position [Unordered List]
- 10. radially spreading (9 taxa)
- 11. pectinately arranged (3 taxa)
8: Leaves: Shape [Unordered List]
- 9. ovate or rhombic-ovate (2 taxa)
- 11. oblanceolate-linear (2 taxa)
- 15. base reduced to sheaths (1 taxon)
9: Leaves: Color [Unordered List]
- 1. pinkish or reddish when young (1 taxon)
10: Leaves: Nature [Unordered List]
11: Leaves: Venation [Unordered List]
12: Leaves: Margin [Unordered List]
14: Leaves: Petiole [Unordered List]
26: Pollen Cone: Position [Unordered List]
27: Pollen Cone: Shape [Unordered List]
- 10. spikes or panicles (2 taxa)
28: Microsporophylls [Unordered List]
- 3. with pendulous pollen sacs (1 taxon)
30: Cones: Shape [Unordered List]
32: Cones: Characteristics [Unordered List]
33: Seed Cones: Position [Unordered List]
34: Seed Cones: Shape [Unordered List]
35: Seed Cones: Bract scales [Unordered List]
- 2. apex reflexed or upcurved or cuspidate (4 taxa)
- 5. basal bracts fused to form a succulent and warty receptacle (2 taxa)
36: Seed scales [Unordered List]
- 5. adnate with bracts in basal (3 taxa)
- 6. detached in apical part (1 taxon)
- 12. connate with bracts (3 taxa)
37: Seeds: Number [Unordered List]
38: Seeds: Shape [Unordered List]
- 5. irregularly triquetrous
- 7. irregularly compressed-ellipsoid (1 taxon)
40: Seeds: Other Characteristics [Unordered List]
- 1. with 1 lateral wing (2 taxa)
- 2. with 2 lateral wings (7 taxa)
- 3. with 2 subapical or apical wings (2 taxa)
- 13. with backward projecting wing (1 taxon)
42: Cotyledons number [Unordered List]
43: Germination [Unordered List]
44: Google Image Search (http://images.google.com.sg/images?sourceid=navclient&hl=zh-CN&ie=UTF-8&rls=GGLG,GGLG:2005-34,GGLG:zh-CN&q=) [Basic URL]
45: Dictionary of The Families & Genera of Chinese Seed Plants (http://db.kib.ac.cn/kesudic/Genera_show.asp?vl=) [Basic URL]
References: |
- The creation of this Interactive Key is mainly based on Flora of China.
- Project supported by Biological Herbarium Construction Project of Chinese Academy of Sciences: Botany Center of Internet Information System.
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