The middle-leaflet of trifoliolate showed higher NPR specific leaf weight ( SLW ) and leaf area and those had a little differences between left-and right-leaflets .

三出 复叶中的中小叶的光合速率、比叶重及叶面积的性状指标高于左、右两片小叶，而左、右 小叶之间差异不大。

As a rule the primary leaves and the 1-4th trifoliolate leaves have greater leaf thickness and more number of palisade cells per unit leaf area .

初生叶和 1&4节位的叶片较厚，单位叶面积栅栏细胞数目多；