Anatomical study on four varieties of Ziziphus jujuba leaves

The anatomical characteristics of four varieties of species Ziziphus jujuba leaves species, consisting of Z. jujuba var. junzao, Z. jujuba var. pingguozao, Z. jujuba var. lizao and Z. jujuba var. goutouzao, were observed. The results show leaves' structure pattern of four varieties of Z. jujuba belongs to isobilateral leaf, which was anatomically characterized by vascular bundle sheath around the vein in some leaves. Besides, some laticifers occur in the main vein of Z. jujuba var. junzao leaves.