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Image Title: Equisetum Stomata
Image Credit: Ryan McMillen, Southern Illinois University
Intended End User: Teacher, Student
Date Created: 2/6/2006
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About the Image

Stomata regulate gas exchange and are interspersed among flat tightly packed epidermal cells. This colorized scanning electron micrograph shows the sunken stoma of Equisetum arvense with the guard cells nearly hidden by overlying subsidiary cells. Highlighted in grey is the silica found in the epidermis, which gives Equisetum arvense a rough feel and the common name scouring rush.

National Science Foundation  Development Supported by the National Science Foundation