Anatomical study of the inflorescence axises of the 5 palmae species

Using 5 species of palmae(Caryota mitia Lour,Phoenix roebelenii O'Brien,Livistona Chinensis(Jacq)R.Br,Archontophoenix alexandrae(F.Muell)H.wendl,Chamaedorea seifrizii Burret)as samples,the anatomical structures of the inflorescence axises of 5 species are observed under light microscope.The results show that 5 species share some common anatomical characters:(1) The transverse section of the inflorescence axis is composed of epidermis,primary tissue and vascular bundle;(2) The vascular bundles that are surrounded by vascular bundle sheath formed of mechanical tissue glomerated in the centre of the transverse section;the interior of the vascular bundle is xylem and the outer is phloem,however,there is no cambium between the xylem and phloem;(3) The fiber bundles disseminates in the primary tissue which is between the epidermis and the vascular bundle groups,whether several features exist would provide significant basis for classification and identification of the 5 species,including the intensity of vascular bundle groups,the richness of the fiber bundles and aerenchyma.These differences of microscopic characteristics can offer evidence for classification relationship of palmae plants.