GERD GUENTHER / SCIENCE PHOTO LIBRARY GERD GUENTHER / SCIENCE PHOTO LIBRARY
Light micrograph of an unripe seed head of Sow-Thistle, Sonchus arvensis, showing several unripened, light-green seed grains with their parachute-like hairs, supporting the aerial dissemination of the seeds. Microscopic contrast technique : Incident lighting. Magnification 30x when printed 10 centimetres wide.
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