Horsetail strobilus, light micrograph

Horsetail strobilus, light micrograph

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Caption: Horsetail spores. Light micrograph of a section through a strobilus of a horsetail (Equisetum sp.), showing the spores within. Horsetails are primitive plants that have existed since the Carboniferous period (360-299 million years ago). Today they are found across much of the world, although there are only 15 species. Magnification: x70 when printed 10cm wide.

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Keywords: biological, biology, botanical, botany, equisetum sp., horsetail, light micrograph, light microscope, microsporangium, nature, plant, pteridophyte, pteridophytes, reproduction, reproductive, section, sectioned, sporangium, spore, spores, strobilus

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