[Comparison of leaf morphological characters among different major varieties of Rehmannia glutinosa].

Objective: To provide theoretical evidences for the identification and selective breeding of different major varieties of Rehmannia glutinosa by comparing their leaf characters such as the shapes, non-glandular hairs and the size and density of stomata.
Method: The length, width and the ratio of the length to the width of leaves were measured, and the density and length of the non-glandular hair, the density, size and density of the stomata in the epidermis were measured by scanning electron microscope.
Result: The results showed that there were obvious differences in length, width and the ratio of the length to the width of leaves, the density and length of the non-glandular hair, the density and size of the stomata in the epidermis.
Conclusion: The morphological characters of the leaves mentioned above may serve as the identification standards of major varieties of R. glutinosa.