GERD GUENTHER / SCIENCE PHOTO LIBRARY GERD GUENTHER / SCIENCE PHOTO LIBRARY
Light micrograph of a seed grain of Stinging Nettle, Urtica dioica, taken from a wildflower. Dried nettle seeds are used in herbal medicine. Microscopic contrast technique : Incident lighting. Magnification 30x when printed 10 centimetres wide.
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