. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. PHYLETIC RELATIONS 653. Fig. 354- Scheme-to illustrate approximately the relations of the several families of Ferns, as concluded from the discussions in the text. It will be noted that the distinctions as Simplices, Gradatae, and Mixtae traverse several of the probable evolutionary lines : the grouping is so disposed that Ferns with marginal sbri lie to the left, with superficial sori to the right. No!attempt is made to connect the lines into a phyletic Please note that these images are extrac
. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. PHYLETIC RELATIONS 653. Fig. 354- Scheme-to illustrate approximately the relations of the several families of Ferns, as concluded from the discussions in the text. It will be noted that the distinctions as Simplices, Gradatae, and Mixtae traverse several of the probable evolutionary lines : the grouping is so disposed that Ferns with marginal sbri lie to the left, with superficial sori to the right. No!attempt is made to connect the lines into a phyletic 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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