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Image Title: Stomata in Psilutum nudum
Image Credit: Ryan McMillen, Southern Illinois University
Intended End User: Teacher, Student
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About the Image

Stomata regulate gas exchange and are interspersed among flat tightly packed epidermal cells. This scanning electron micrograph was colorized to emphasize the sunken stoma of Psilotum nudum, commonly known as the whisk fern. Epicuticular wax is formed as webbing over the gaurd cells.

National Science Foundation  Development Supported by the National Science Foundation