. Studies in fossil botany . Paleobotany. LEAVES OF CALAMARIEAE 39 sheath at the base. Each leaf is traversed by a vein, and further to the interior the commissural vascular bundles of the node are visible. It is possible that in many cases the sheath became split up as the stem increased in thickness. Immediately below a node the cortex of the stem shows in some specimens a number of prominent ribs, corresponding to the bases of the verticillate leaves. Fig. 13.—Catamites, sp. Part of transverse section close to a node, showing the prominent leaf-bases, Lb. x, secondary wood ; /, fisttilar pi
. Studies in fossil botany . Paleobotany. LEAVES OF CALAMARIEAE 39 sheath at the base. Each leaf is traversed by a vein, and further to the interior the commissural vascular bundles of the node are visible. It is possible that in many cases the sheath became split up as the stem increased in thickness. Immediately below a node the cortex of the stem shows in some specimens a number of prominent ribs, corresponding to the bases of the verticillate leaves. Fig. 13.—Catamites, sp. Part of transverse section close to a node, showing the prominent leaf-bases, Lb. x, secondary wood ; /, fisttilar pith. Magnified. From a section lent by the late Mr. J. Butterworth of Shaw. (G. T. G.) which sprang from the node. This is well shown, in transverse section, in Fig. As regards the anatomical structure of the leaves of the Calamites there is comparatively little to be said. In Calamites itself the simple acicular leaves were each traversed by a single nerve (see Fig. 12) ; in some of the other forms, as in Calamadadus? according to 1 For the use of the specimens illustrated in Figs. 12 and 13 I am indebted to the late Mr. John Butterworth of Shaw. 2 The foliage of Calamarieae will be further described, as regards its outward aspect, in the following 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 Scott, Dukinfield Henry, 1854-1934. London, A. and C. Black
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