The epidermis of culm of S. alterniflora, S. patens and S. cynosuroides is all made up of long cells, short cells (cork cells and silica cells), salt glands and stomatal apertures.

• 互花米草、狐米草和大绳草的表皮均由长细胞、短细胞(栓质细胞和硅质细胞)、盐腺和气孔器组成。