. Fossil plants : for students of botany and geology . Paleobotany. Part of a transverse section of a Permian Osmundaceous Fern stem, Thanmopteris Schlechtendalii (Eichwald). a, outer xylem; b, inner xylem. For description, see page 329. (After Kidaton and Gwynne-Vaughan. Very slightly reduced.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press

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Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898