Final answer:
The intercalary meristem is found at the bases of leaves and stems, enabling plants, especially monocots, to grow in length at these locations.
Step-by-step explanation:
The type of meristematic tissue located at the bases of leaves and stems is the intercalary meristem. Apical meristems are located at the tips of stems and roots, and are responsible for a plant's increase in length. On the other hand, lateral meristems, which include the vascular cambium and cork cambium, contribute to the thickness or girth of the plant. The intercalary meristem is found in monocots at the bases of leaf blades and at nodes, which allows the leaves to continue to grow after being cut or eaten.