English: Surface view of a polished piece of Rhynie Chert showing a corm/tuber of Horneophyton. A smaller magnification view of the same specimen is at File:Rhynie chert with Horneophyton 1.png. With thanks to H.-J. Weiss who gave me the sample of Rhynie Chert. (Multiple photos were taken using a binocular microscope set to x60 and a digital camera; the images were then combined using Adobe Photoshop Elements.)
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