Table 2 The leaf anatomical characters and character states used in phenetic analyses
Anatomical characters | Character states | Score |
|---|---|---|
Qualitative characters | ||
 1. Epidermal cell wall on adaxial leaf surface | Straight to slightly curved/sinuate | 0/1 |
 2. Epidermal cell wall on abaxial leaf surface | Straight to slightly curved/sinuate | 0/1 |
 3. Types of non-glandular trichome on abaxial leaf surface | Large and small straight trichome/large straight and small curly trichome | 0/1 |
 4. Shape of petiole | Slightly concave/convex | 0/1 |
 5. Midrib outline and adaxial curvature | Rounded/acute | 0/1 |
 6. Leaf margin shape | Rounded/acute | 0/1 |
Quantitative characters | ||
 7. Ratio of adaxial leaf epidermal cell size (width: length) | Ratio is less than or equal to 0.7/ratio is more than 0.7 | 0/1 |
 8. Stomatal index (SI) on adaxial leaf surface | SI is less than or equal to 6/SI is more than 6 | 0/1 |
 9. Ratio of stomatal size on adaxial leaf surface (width: length) | Ratio is less than or equal to 0.6/ratio is more than 0.6 | 0/1 |
 10. Ratio of glandular trichome size on adaxial leaf surface (width: length) | Ratio is less than or equal to 0.92/ratio is more than 0.92 | 0/1 |
 11. Ratio of non-glandular trichome size on adaxial leaf surface (width: length) | Ratio is less than or equal to 0.08/ratio is more than 0.08 | 0/1 |
 12. Ratio of abaxial leaf epidermal cell size (width: length) | Ratio is less than or equal to 0.65/ratio is more than 0.65 | 0/1 |
 13. Stomatal index (SI) on abaxial leaf surface | SI is less than or equal to 15/SI is more than 15, but less than or equal to 30/SI is more than 30 | 0/1/2 |
 14. Ratio of stomatal size on abaxial leaf surface (width: length) | Ratio is less than or equal to 0.75/ratio is more than 0.75 | 0/1 |
 15. Ratio of glandular trichome size on abaxial leaf surface (width: length) | Ratio is less than or equal to 0.9/ratio is more than 0.9 | 0/1 |
 16. Ratio of non-glandular trichome size on abaxial leaf surface (width: length) | Ratio is less than or equal to 0.03/ratio is more than 0.03, but less than or equal to 0.04/ratio is more than 0.04 | 0/1/2 |
 17. Ratio of epidermal cells size in petiole (width: length) | Ratio is less than or equal to 0.7/ratio is more than 0.7 | 0/1 |
 18. Ratio of petiole transverse section (width: length) | Ratio is less than or equal to 0.82/ratio is more than 0.82, but less than or equal to 0.95/ratio is more than 0.95 | 0/1/2 |
 19. Ratio of palisade mesophyll cell size in leaf transverse section (width: length) | Ratio is less than or equal to 0.2/ratio is more than 0.2 | 0/1 |
 20. Ratio of spongy mesophyll cell size in leaf transverse section (width: length) | Ratio is less than or equal to 0.7/ratio is more than 0.7 | 0/1 |
 21. Ratio of adaxial epidermal cell size in leaf transverse section (width: length) | Ratio is less than or equal to 0.7/ratio is more than 0.7 | 0/1 |
 22. Ratio of abaxial epidermal cell size in leaf transverse section (width: length) | Ratio is less than or equal to 0.7/ratio is more than 0.7 | 0/1 |
 23. Blade thickness (µm) | Thickness is less than or equal to 208/thickness is more than 208, but less than or equal to 248/thickness is more than 248 | 0/1/2 |
 24. Ratio of midrib thickness (width: length) | Ratio is less than or equal to 1/ratio is more than 1 | 0/1 |