Study on the micromorphology of leaf lower epidermis of Aniselytron

The micromorphology of the leaf lower epidermis for 19 species belonging to Aniselytron and its related genera of Poaceae were observed by scanning electron microscope. The result showed that the epidermal structure of Aniselytron and its related genera contained long cells,short cells,subsidiary cells and prickle-hairs et al. The appearance and distribution of them were inconsistent. The intercostal long cells in Aniselytron were rhomboid,and the long cell outlines were straight. The intercostal short cells occurred solitary or together with prickles. The shapes of silica cells in costal zones were nodular. Parallel-shaped subsidiary cells were found,and prickles frequently occurred both in costal and intercostal zones. The micromorphology characteristics of leaf epidermis revealed that Aniselytron was closely related to Poeae,and a distantly related to Calamagrostis s. l.,Agrostideae and Aveneae. According to the micromorphology of the leaf lower epidermis,we draw the conclusion that Aniselytron should be placed in Poeae.