DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Plant stem trichomes. Polarised light micrograph of simple multicellular hairs (trichomes) on the surface (epidermis) of a stem of hedge woundwort (Stachys sylvatica). Trichomes are specialised structures that may perform several functions, such as preventing water loss or deterring animals from eating the plant.
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