1. Apical meristems: These are found at the tips of roots and shoots (stems). They are responsible for primary growth, which involves the elongation of roots and stems, and the formation of new leaves and flowers.

2. Lateral meristems: These are found in the vascular cambium and cork cambium. They are responsible for secondary growth, which involves the thickening of roots and stems. The vascular cambium produces new vascular tissues (xylem and phloem), while the cork cambium produces the outer protective layer of bark.

Let me know if you'd like more details about each type!