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Interactive Key for genera of Chinese Gymnosperms         Search

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)
    • 3. decussately arranged   (1 taxon)
    • 4. prominently jointed   (2 taxa)
    • 6. irregularly alternate
    • 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)
    • 3. irregularly vertical   (1 taxon)
    • 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)
    • 4. with leafy branchlets   (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] 8: Leaves: Shape [Unordered List] 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] 28: Microsporophylls [Unordered List] 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] 36: Seed scales [Unordered List] 37: Seeds: Number [Unordered List] 38: Seeds: Shape [Unordered List] 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)
    • 4. with unequal wing   (5 taxa)
    • 7. connate with bracts   (1 taxon)
    • 8. apex mucronate   (5 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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