Anatomy: The pericycle form fibers group, the part secondary phloem has fibers group, the midrib is 1.5 times thicker the leaf blade, xylem and phloem form big arc shape, the leaf blade with heterostructure, the palisade parenchyma is 1 layer; the schizogenous secretory bags, internal phloem present and crystals of calcium oxalate in stem and leaf anatomy.