Fern frond, light micrograph. Transverse section through the frond of a fern (Cyrtomium falcatum), showing the sporangia. At left is a central vascula

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Fern frond, light micrograph. Transverse section through the frond of a fern (Cyrtomium falcatum), showing the sporangia. At left is a central vascular bundle (meristele) with central xylem tissue (red) surrounded by phloem (light green). On the underside of the frond are two sori (right) each consisting of an umbrella-shaped indusium with a handle-shaped base (placenta), from which protrude numerous stalked sporangia (containing the reproductive spores). Magnification: x19 when printed at 10 centimetres wide.

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Size: 5138px × 3425px
Photo credit: © DR KEITH WHEELER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: anatomical, anatomy, background, biological, biology, botanical, botany, capsule, capsules, cell, cells, cellular, cross-section, cylinder, cyrtomium, falcatum, fern, ferns, flora, frond, indusium, internal, light, lm, meristele, micrograph, microscope, nature, part, parts, plant, plants, pteridophyte, pteridophytes, reproduction, reproductive, section, sectioned, sori, sorus, sporangia, sporangium, spore, spores, structural, structure, tissue, transverse, vascular, white