I just made this longitudinal section of rice leaf using this procedure, but I end up being confused to determine the stomata. Unfortunately I couldn't upload my photograph here. I really need help for this..
Department of Biology, Faculty of Sciences, Kyushu University, Japan
Sorry for late reply. If your problem still remains unsolved, send your photographs to the following address. I will look for stomata. kkususcb@kyushu-u.org