. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. OF EOUISETALES 149 verticil : these variations in number of the sporangiophores would be difficult to harmonise with any reference to "leaf-segments," as ordinarily understood elsewhere ; and their disposition suggests the idea of chorisis of the sporangiophore similar to that seen frequently in the stamens of Angiospermic flowers. Fig. 73. Forked sporophyll of Sfiheno- phythtm majits^ bearing spor- angiophore. (After Kidston.). Please note that these images are extracted from scanned page i
. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. OF EOUISETALES 149 verticil : these variations in number of the sporangiophores would be difficult to harmonise with any reference to "leaf-segments," as ordinarily understood elsewhere ; and their disposition suggests the idea of chorisis of the sporangiophore similar to that seen frequently in the stamens of Angiospermic flowers. Fig. 73. Forked sporophyll of Sfiheno- phythtm majits^ bearing spor- angiophore. (After Kidston.). 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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