. Fossil plants : for students of botany and geology . Paleobotany. FiQ. 252. Osmundites Dimlopi Kidst. and Portion of xylem showing the departure of a leaf-trace. (After Kidston and Gwynne-Vaughan; x 36.) In the continuity of the xylem cylinder this species of Osmundites shows a closer approach to Todea harbara or T. superha (fig. 221, B) than to species of Osmunda; it differs from Zalesskya in having reached a further stage in the re- duction of a solid protostele to one composed of a xylem cylinder enclosing a pith. This difference is of the same kind as that which distinguishes the s
. Fossil plants : for students of botany and geology . Paleobotany. FiQ. 252. Osmundites Dimlopi Kidst. and Portion of xylem showing the departure of a leaf-trace. (After Kidston and Gwynne-Vaughan; x 36.) In the continuity of the xylem cylinder this species of Osmundites shows a closer approach to Todea harbara or T. superha (fig. 221, B) than to species of Osmunda; it differs from Zalesskya in having reached a further stage in the re- duction of a solid protostele to one composed of a xylem cylinder enclosing a pith. This difference is of the same kind as that which distinguishes the stele of Lepidodendron rhodum- nense from L. Harcourtii. In Lepidodendron short tracheae occasionally occur on the inner edge of the xylem cylinder, and. 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
