STEFAN DILLER / SCIENCE PHOTO LIBRARY STEFAN DILLER / SCIENCE PHOTO LIBRARY
Stevia leaf stomata, coloured scanning electron micrograph (SEM). Stomata (oval openings) are the gas exchange pores found in the epidermis of plant leaves and stems..Stevia rebaudiana (the sugarleaf) is a plant grown for its leaves, used as a source of natural sweetners.
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