. Fossil plants : for students of botany and geology . Paleobotany. Fig. .555. Williamsonia whitbiensis. (After Nathorst; | nat. size.). Pig. 556. Williamsonia whitbiensis. A, male flower. B, sporophyll with synangia. (After Nathorst.) (fig. 552). The inner face of each sporophyll, as seen in im- pressions, shows two regular rows of small depressions, one on each side of the median line; these become gradually smaller towards the base of the cup-Uke disc (figs. 555, 556). On the actual carbonised surface of the inner face of the cup small and transversely elongated projections take the place o

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. Fossil plants : for students of botany and geology . Paleobotany. Fig. .555. Williamsonia whitbiensis. (After Nathorst; | nat. size.). Pig. 556. Williamsonia whitbiensis. A, male flower. B, sporophyll with synangia. (After Nathorst.) (fig. 552). The inner face of each sporophyll, as seen in im- pressions, shows two regular rows of small depressions, one on each side of the median line; these become gradually smaller towards the base of the cup-Uke disc (figs. 555, 556). On the actual carbonised surface of the inner face of the cup small and transversely elongated projections take the place of. 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