. The geological history of plants [microform]. Paleobotany; Paléobotanique. THE CARBONIFEROUS FLORA. 125 and complicated stems belonged to higher and nobler types of mare's-tails tiian those of the modern world, and that their fructification was equisetaceous and of the form known as Calamostachys. We have already seen that noble tree-ferns existed in the Erian period, and these were continued, and their number and variety greatly extended, in the Carbonifer- ous. In regard to the structure of their stems, and the method of supporting these by atrial roots, the tree-ferns of all ages have bee
. The geological history of plants [microform]. Paleobotany; Paléobotanique. THE CARBONIFEROUS FLORA. 125 and complicated stems belonged to higher and nobler types of mare's-tails tiian those of the modern world, and that their fructification was equisetaceous and of the form known as Calamostachys. We have already seen that noble tree-ferns existed in the Erian period, and these were continued, and their number and variety greatly extended, in the Carbonifer- ous. In regard to the structure of their stems, and the method of supporting these by atrial roots, the tree-ferns of all ages have been nearly alike, and the form and structure of the leaves, except in some comparatively rare and exceptional types, has also been much the same. Any ordinary observer examining a collection of coal- formation ferns recognises at once tlieir kinship to the familiar brackens of our own time. Their fructification is, unfortunately, rarely preserved, so that we are not able, in the case of many species, to speak confidently of. 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 Dawson, J. W. (John William), Sir, 1820-1899. New York : D. Appleton
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleobo, bookyear1888
