. Fossil plants : for students of botany and geology . Paleobotany. 444 COENOPTERIDEAE [CH. of protoxylem elements shown by the white patches in fig. D. In this as in other members of the Zygoptereae the main rachis of the leaf gives off four sets of branches in pairs alternately. B (. 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