(i) Apical meristems: o Location:These meristems occur at the tip of the roots and the tip of the shoots the shoot apical meristems mostly occupy the distant most region of the stem axis. o Function:They help in the elongation of the root and shoot. As they appear in the early life of the plant they contribute to the formation of the primary plant body. (ii) Intercalary meristems: o Location:These meristems occur between mature tissues. They are also present in the axils of the leaf. o Function:They are capable of forming branches and flowers. In grasses they help in regenerating the parts removed by the grazing animals. Both the above meristems are called primary meristems. (iii) Secondary or Lateral meristems: o Location:They occur in the mature regions of roots and shoots especially in the woody axis. o Function:Their main function is to produce the secondary tissue.