P. DAYANANDAN / SCIENCE PHOTO LIBRARY P. DAYANANDAN / SCIENCE PHOTO LIBRARY
Light micrograph, fluorescent staining, of the leaf surface (epidermis) of the common blue- flowered tropical weed, Commelina sp. . The micrograph shows numerous small, green, oval stomata & a number of leaf hairs or trichomes. Stomata are pores in the epidermis; they function in the gas exchange between the plant & the atmosphere. Magnification: x30 at 35mm size.
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