A stomatal apparatus on the cotton leaf.

For a labeled photograph of a cotton stomata, click on this image.
Stomata occur among the epidermal cells in some plant organs and consist of a pore surrounded by two guard cells. Stomata, together with associated subsidiary cells, form the stomatal apparatus. A stoma is a controllable opening in the plant's surface to allow the escape of water vapor and the exchange of carbon dioxide and oxygen with the mesophyll inside.

Introduction | Flowers&Fruit | Roots | Stems | Leaves

© Thomas L. Rost 1998
Section of Plant Biology Division of Biological Sciences