The Preliminary Anatomy of the Vegetative Organ Cajanmus cajan

In order to understand the anatomical structure of the vegetative organs of Cajanmus cajan,the anatomical structure of the root,stem and leaf was observed,and the development process of root,stem and leaf of Cajanmus cajan was studied by the way of permanent paraffin section and photics microscope photography.The results indicated that the protoxylem of Cajanmus cajan in the main root was mostly tetrarched,less pentarched and hexad.The latter root was rich in root nodule.The primary structure of stem consisted of big and small vascular bundles and they formed a cycle.It was a collateral bundle and the mesophyll was bigger.The vascular of the xylem in the secondary structure of stem contained large quantities of fiber and medullary.The leaf was bifacial leaf,its epidermal hair was multi-cellular.The density of stoma in the down-epidermis was bigger than the up-epidermis,the two sides of the leaf had corneous layer.