. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. 124 VARIATIONS IN NUMBER OF SPORANGIA morphology of Vascular Plants ; while the regularity and constancy in number and position of the sporangia in the Lycopods, Equiseta, and Eusporangiate Ferns, in which interpolation does not occur, has been underestimated. But these, on grounds of comparison, and of fossil history, are among the most primitive of Vascular Plants. Thus interpolation of new sporangia is to be recognised as an actual factor of increase in number of sporangia, but it is not a general
. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. 124 VARIATIONS IN NUMBER OF SPORANGIA morphology of Vascular Plants ; while the regularity and constancy in number and position of the sporangia in the Lycopods, Equiseta, and Eusporangiate Ferns, in which interpolation does not occur, has been underestimated. But these, on grounds of comparison, and of fossil history, are among the most primitive of Vascular Plants. Thus interpolation of new sporangia is to be recognised as an actual factor of increase in number of sporangia, but it is not a general phenomenon, and there is reason to. 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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