POWER AND SYRED / SCIENCE PHOTO LIBRARY POWER AND SYRED / SCIENCE PHOTO LIBRARY
Hyssop pollen grains. Coloured scanning electron micrograph (SEM) of pollen grains (blue-green) from the herb hyssop (Hyssopus officinalis) plant on a petal (red). Pollen grains are produced in the anthers of the flower and contain the male gametes required for reproduction. Hyssop is a medicinal perennial plant found growing wild in southern and eastern Europe. Its flowers are used as a tonic and a sedative. Magnification: x1470 when printed 10 centimetres wide.
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