Horsetail strobili, SEM

Horsetail strobili, SEM

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Credit: EYE OF SCIENCE/SCIENCE PHOTO LIBRARY

Caption: Horsetail strobili. Coloured scanning electron micrograph (SEM) of strobili from a horsetail (Equisetum sp.). Strobili are reproductive structures. They contain sporangiophores (brown), each of which holds 5 to 10 sporangia, which contain spores, the reproductive cells of the horsetail. Horsetails are primitive plants that have existed since the Carboniferous period (360- 299 million years ago). Today, although only 15 species still exist, they are found across much of the world. Magnification: x30 when printed at 10 centimetres wide.

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Keywords: biochemical, biological, biology, botanical, botany, coloured, equisetum sp., false-coloured, flora, horsetail, nature, plant, primitive, pteridophyte, pteridophytes, reproduction, reproductive, scanning electron micrograph, scanning electron microscope, sem, sporangia, sporangiophore, sporangiophores, sprorangium, strobili, strobilus

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