Horsetail spore, SEM

Horsetail spore, SEM

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Caption: Horsetail spore. Coloured scanning electron micrograph (SEM) of a spore of a horsetail (Equisetum arvense) plant. 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: x370 when printed 10 centimetres wide.

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Keywords: 1, 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, one, plant, pteridophyta, pteridophyte, pteridophytes, reproduction, reproductive, scanning electron micrograph, scanning electron microscope, sem, single, sphenopsida, spore

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