Table 5. The stomatal parameters of mature trees and seedling leaves of H. hainanensis.

Type	Stomatal density (SD) (counts/mm2)	Stomatal length (SL) (µm)	Stomatal width (SW) (µm)	Stomatal area (SA) (µm2)
Mature trees	95.26 ± 5.35	14.57 ± 1.30	3.24 ± 0.91	37.34 ± 12.15
Seedlings	106.23 ± 3.66	14.04 ± 0.35	6.93 ± 0.37	76.45 ± 5.95
P value	0.031*	0.533	0.003**	0.007**

Notes:

The values in the table are the mean and standard deviation.

^*Indicates significant difference.

^**Indicates extremely significant difference.