. Studies in fossil botany . Paleobotany. LEPIDODENDRON H5 Lepidodendron selaginoides is at once distinguished anatomically from the other species by the peculiar structure of the central cylinder. No definite pith is present ; the tracheae of the primary wood extend to. Fig. 5g.—Lefiidodendron selaginoides. Transverse section of young branch, before secondary wood has formed, jr, primary xylem-cylinder; pc, zone of phloem and pericycle; c, inner cortex, differentiated into three layers; c2, outer cortex ; pd, periderm ; beyond this are the leaf-bases; Ig, ligule ; , leaf-traces, at various
. Studies in fossil botany . Paleobotany. LEPIDODENDRON H5 Lepidodendron selaginoides is at once distinguished anatomically from the other species by the peculiar structure of the central cylinder. No definite pith is present ; the tracheae of the primary wood extend to. Fig. 5g.—Lefiidodendron selaginoides. Transverse section of young branch, before secondary wood has formed, jr, primary xylem-cylinder; pc, zone of phloem and pericycle; c, inner cortex, differentiated into three layers; c2, outer cortex ; pd, periderm ; beyond this are the leaf-bases; Ig, ligule ; , leaf-traces, at various points on their outward course. X about 7. S. Coll. 1376. (G. T. G.) the centre of the stele (Figs. 59 and 60). The outer part of the primary xylem has the structure usual in the genus; at the extreme periphery there are a number of slightly prominent points, at and near which the spiral elements are placed. Here then, as in other 10. 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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