Abstract:

The anatomical structures of stem from Cornus officinalis were studied by the method of paraffin sectioning and optical microscopic observation. Results show that the primary structure consisted of epidermis，cortex and central cylinder from the outer to inner；epidermic cells are arranged closely，and the horny layers of the epidermic are depth of 1-1.5 ?m about；There are many collenchymas in cortex which are thriving；Pith is developed and has an obvious belt. The secondary structure included periderm and secondary vascular tissue from the outer to inner，there are indistinct between spring wood and autumn，and the vessels are scattered in secondary xylem. The features of primary structure and secondary structure adapted to the xenomorphic.