. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. 37^ EOUISETALES it. In fact it is to be recognised that, speaking of the bracts, "a tendency to multiply the number of appendages in each whorl seems to have been. 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 Bower, F. O. (Frederick Orpen), 1855-1948. London, Macmillan and Co. , Ltd.

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