Horsetail spores, SEM

Horsetail spores, SEM

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Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Horsetail spores. Coloured scanning electron micrograph (SEM) of spores of a horsetail (Equisetum arvense) plant. The spores (round) bear elaters (helical), which expand and contract with changes in humidity. Elaters help to tangle spores together into a clump called a propagule, and to dig the spores into the soil. Magnification: x350 when printed 10 centimetres wide.

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Keywords: biological, biology, botanical, botany, coloured, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, dispersal, elater, elaters, equisetopsida, equisetum arvense, false-colour, false-coloured, family equisetaceae, fern, flora, horsetail, nature, plant, pteridophyta, pteridophyte, pteridophytes, reproduction, reproductive, scanning electron micrograph, scanning electron microscope, sem, sphenopsida, spore, spores

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