. Studies in fossil botany . Paleobotany. 360 STUDIES IN FOSSIL BOTANY outgoing leaf-trace bundles, which are collateral in structure (Figs. 129 and 132). They keep a nearly vertical course for some distance, and do not leave the pericyclic zone until they bend out sharply through the cortex, to enter the bases of the leaves. The outer cells of the pericycle have generally. Fig. 130.—Lygiaodendron oldhamiiim. Transverse section of stem (structure as in Fig. 129), surrounded by a mass of foliage, showing rachis and leaflets cut in various directions. On the left, the stem is giving off an adven
. Studies in fossil botany . Paleobotany. 360 STUDIES IN FOSSIL BOTANY outgoing leaf-trace bundles, which are collateral in structure (Figs. 129 and 132). They keep a nearly vertical course for some distance, and do not leave the pericyclic zone until they bend out sharply through the cortex, to enter the bases of the leaves. The outer cells of the pericycle have generally. Fig. 130.—Lygiaodendron oldhamiiim. Transverse section of stem (structure as in Fig. 129), surrounded by a mass of foliage, showing rachis and leaflets cut in various directions. On the left, the stem is giving off an adventitious root. X 4. From a photograph by Mr. L. A. Hoodie. S. Coil. 636. given rise to a few layers of periderm (Figs. 129, 132, 134, pd), which, however, does not reach any great development in Lyginodendron. Beyond the periderm we come to the thin-walled inner cortex, usually ill preserved, and then to the very characteristic outer cortex, consisting of interlacing strands of fibrous sclerenchyma, forming a network, with the meshes occupied by cellular tissue. In transverse section the. 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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