. Fossil plants : for students of botany and geology . Paleobotany. 144 LYCOPODIALES [CH. Figs. 162 and 163 illustrate the structure of the outer portion of the xylem and adjacent tissues in a section of a shoot 3-8 cm. X 2-5 cm. in diameter, which is in the act of branching, as shown by the occurrence of two steles of equal size. A figure of the complete section will be found in Binney's memoir\ and additional illustrations were published in 18991 The primary xylem (figs. 162, 163, x) is succeeded by 2—3. < js Fig. 164. Lepidodendron fuliginosum. Leaf-trace. (Binney Collection, Cambridge.)
. Fossil plants : for students of botany and geology . Paleobotany. 144 LYCOPODIALES [CH. Figs. 162 and 163 illustrate the structure of the outer portion of the xylem and adjacent tissues in a section of a shoot 3-8 cm. X 2-5 cm. in diameter, which is in the act of branching, as shown by the occurrence of two steles of equal size. A figure of the complete section will be found in Binney's memoir\ and additional illustrations were published in 18991 The primary xylem (figs. 162, 163, x) is succeeded by 2—3. < js Fig. 164. Lepidodendron fuliginosum. Leaf-trace. (Binney Collection, Cambridge.) rows of polygonal cells with dark contents and associated with isodiametric tracheae: these pass into clearer parenchymatous tissue, a, characterised by the arrangement of the cells in vertical series, to which the term meristematic zone has been applied. The secretory zone, s, abutting on the meristematic zone, consists of more or less disorganised parenchymatous cells 1 Binney (72) PI. xm. fig. 1. 2 geward (99).. 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
Size: 966px × 2587px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
