Immature Sorus, Sword Fern

Immature Sorus, Sword Fern

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Credit: Garry DeLong/SCIENCE PHOTO LIBRARY

Caption: A developing immature sorus of the sword fern (Polystichum munitum). The round objects will become sporangia, each of which will contain spores. If this photo is viewed enlarged, stomata (breathing pores) are easily visible at the top of the image. Photographed from a live specimen. Magnification 28x when printed at 10 cm.

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Keywords: biology, botany, breathing pores, fern, haploid, meiosis, micrograph, microscope, microscopic, polystichum, polystichum munitum, sori, sorus, sporangia, sporangium, spores, sporophyte, stomata, sword fern, western fern

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