. The geological history of plants. Paleobotany; 1888. THE CARBONIFEROUS FLORA. 113 the thin bark and firm wood with which we are familiar in our modern trees, it has a hard external rind, then a great thickness of celluldr matter with rope-like bands of fibres, constituting an inner bark, while in the centre is a firm, woody axis of comparatively small diameter, and. Fig. Zi.—SigUlwria Lorwayana, Dawson, a. Zones of fruit-soars. 6, Leaf- scar enlarged, o. Fruit-soar enlarged. See appended note. somewhat intermediate in its structures between that of the Lepidodendra and those of the cycads an
. The geological history of plants. Paleobotany; 1888. THE CARBONIFEROUS FLORA. 113 the thin bark and firm wood with which we are familiar in our modern trees, it has a hard external rind, then a great thickness of celluldr matter with rope-like bands of fibres, constituting an inner bark, while in the centre is a firm, woody axis of comparatively small diameter, and. Fig. Zi.—SigUlwria Lorwayana, Dawson, a. Zones of fruit-soars. 6, Leaf- scar enlarged, o. Fruit-soar enlarged. See appended note. somewhat intermediate in its structures between that of the Lepidodendra and those of the cycads and the taxine conifers. Thus a great stem, five feet in diameter, may consist principally of cellular and bast fibres with very little true woody matter. The roots of this tree are. 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, John William, Sir, 1820-1899. New York, D. Appleton and Company
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