Abstract
III.—Origin of Types THE two most general and distinctive types of foliage among angiosperms are those characteristic of monocotyledons and dicotyledons respectively. They owe their principal traits of shape and venation to the manner in which these two great fundamental classes have been separately evolved from lower ancestors.
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ALLEN, G. The Shapes of Leaves 1 . Nature 27, 492–495 (1883). https://doi.org/10.1038/027492b0
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DOI: https://doi.org/10.1038/027492b0