A mature vascular plant, e.g., a tobacco plant, contains several differentiated cell types. These are grouped together in tissues.
Some tissues contain only one type of cell.
Some consist of several. The main function of meristematic tissue is mitosis . The cells are small, thin-walled, with no central vacuole and no specialized features. Meristematic tissue is located in the apical meristems at the growing points of roots and stems. The cells produced in the meristems soon become differentiated into one or another of several types.