. Fossil plants : for students of botany and geology . Paleobotany. 148 LYCOPODIALES [CH. This band of meristem, which we may speak of as the cambium, occurs in the outer region of the meristematic zone immediately internal to the secretory zone, sc. The result of the activity of this cambium band is the production of secondary parenchyma and tracheal tissue. In fig. 179, E, drawn from a portion of the section represented in a Sc. m--i W^Btfi Fig. 168. A. Lepidodendron vasculare. (Botany School, Cambridge.) B. Lepidodendron fuUginosum. (From a specimen from Shore, Lancashire, in the Cambridge
. Fossil plants : for students of botany and geology . Paleobotany. 148 LYCOPODIALES [CH. This band of meristem, which we may speak of as the cambium, occurs in the outer region of the meristematic zone immediately internal to the secretory zone, sc. The result of the activity of this cambium band is the production of secondary parenchyma and tracheal tissue. In fig. 179, E, drawn from a portion of the section represented in a Sc. m--i W^Btfi Fig. 168. A. Lepidodendron vasculare. (Botany School, Cambridge.) B. Lepidodendron fuUginosum. (From a specimen from Shore, Lancashire, in the Cambridge Botany School Collection). C. L. fuUginosum. ("Biseriate Halonia" of Weiss No. 257, Manchester University Museum.) D. L. fuUginosum. (Manchester Univ. Museum.) lig. 168, B, a projecting arm of primary xylem is seen at x; this is followed by 2—3 layers of parenchymatous cells, some of which have dark contents, and beyond this is seen a group of secondary elements, tr, cut across somewhat obliquely, which are evidently products of the cambial cells on the inner margin. 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 Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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