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Table 5 Factor loading and cumulative eigenvalue percentage received from 24 leaf anatomical characters

From: Identification among morphologically similar Argyreia (Convolvulaceae) based on leaf anatomy and phenetic analyses

Anatomical characters Component
1 2
1. Epidermal cell wall on adaxial leaf surface 0.024 −0.086
2. Epidermal cell wall on abaxial leaf surface 0.071 0.397
3. Types of non-glandular trichome on abaxial leaf surface 0.051 0.059
4. Shape of petiole 0.076 0.131
5. Midrib outline and adaxial curvature −0.217 0.153
6. Leaf margin shape 0.146 0.245
7. Ratio of adaxial leaf epidermal cell size 0.051 0.059
8. Stomatal index (SI) on adaxial leaf surface −0.193 0.067
9. Ratio of stomatal size on adaxial leaf surface −0.124 0.281
10. Ratio of glandular trichome size on adaxial leaf surface −0.202 0.118
11. Ratio of non-glandular trichome size on adaxial leaf surface 0.000 −0.163
12. Ratio of abaxial leaf epidermal cell size 0.093 0.172
13. Stomatal index (SI) on abaxial leaf surface 0.222 0.159
14. Ratio of stomatal size on abaxial leaf surface 0.043 0.113
15. Ratio of glandular trichome size on abaxial leaf surface −0.197 −0.304
16. Ratio of non-glandular trichome size on abaxial leaf surface −0.448 −0.229
17. Ratio of epidermal cell size in petiole 0.122 0.390
18. Ratio of petiole transverse section −0.430 0.026
19. Ratio of palisade mesophyll cell size in leaf transverse section 0.076 0.063
20. Ratio of spongy mesophyll cell size in leaf transverse section −0.114 0.284
21. Ratio of adaxial epidermal cell size in leaf transverse section 0.177 0.103
22. Ratio of abaxial epidermal cell size in leaf transverse section 0.108 −0.245
23. Blade thickness −0.504 0.243
24. Ratio of midrib thickness 0.083 −0.156
Eigenvalue 1.3776 1.0784
Cumulative % of eigenvalue 28 49.9