Leaves may be Hypostomatic, Epistomatic and Amphistomatc on the basis of location of stomata. When stomata is present on the under side of leaf then it is called Hypostomatic. These are present in dicots. For example Ficus and Nerium.

In epistomatic leaf stomata are present only in adaxial surface (upper surface) of leaf. Epistomatic leaves are found in aquatic plants. Nymphaea is an example.

In Amphistomatic leaf stomata are present in both adaxial and abaxial surface of leaf. Such leaves are present in most herbaceous dicots.

When stomata are present below the level of epidermal cell, then it is called sunken stomata. It is the main characteristic of xerophytes.