. Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 97 which constituted the conducting tissue connecting the leaf with the main vascular system of the stem. The two lateral scars (figs. 145, A,p; 146, C,s; 147, p) represent the exposed ends of two strands of tissue, the forked branches of a strand which pass from the middle cortex of the stem into the leaf; this is known as the parichnos, a name proposed by Professor Bertrand in 1891^ The specimen shown in fig. 141 shows the linear leaves attached to their respective cushions.. Fio. 141. Lepidodendron Sternbe
![. Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 97 which constituted the conducting tissue connecting the leaf with the main vascular system of the stem. The two lateral scars (figs. 145, A,p; 146, C,s; 147, p) represent the exposed ends of two strands of tissue, the forked branches of a strand which pass from the middle cortex of the stem into the leaf; this is known as the parichnos, a name proposed by Professor Bertrand in 1891^ The specimen shown in fig. 141 shows the linear leaves attached to their respective cushions.. Fio. 141. Lepidodendron Sternbe Stock Photo](https://c8.alamy.com/comp/RDBCAG/fossil-plants-for-students-of-botany-and-geology-paleobotany-xv-lepidodendron-97-which-constituted-the-conducting-tissue-connecting-the-leaf-with-the-main-vascular-system-of-the-stem-the-two-lateral-scars-figs-145-ap-146-cs-147-p-represent-the-exposed-ends-of-two-strands-of-tissue-the-forked-branches-of-a-strand-which-pass-from-the-middle-cortex-of-the-stem-into-the-leaf-this-is-known-as-the-parichnos-a-name-proposed-by-professor-bertrand-in-1891-the-specimen-shown-in-fig-141-shows-the-linear-leaves-attached-to-their-respective-cushions-fio-141-lepidodendron-sternbe-RDBCAG.jpg)
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. Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 97 which constituted the conducting tissue connecting the leaf with the main vascular system of the stem. The two lateral scars (figs. 145, A, p; 146, C, s; 147, p) represent the exposed ends of two strands of tissue, the forked branches of a strand which pass from the middle cortex of the stem into the leaf; this is known as the parichnos, a name proposed by Professor Bertrand in 1891^ The specimen shown in fig. 141 shows the linear leaves attached to their respective cushions.. Fio. 141. Lepidodendron Sternbergii. From a specimen in the British Museum (No. v. 12.3.5) from the Coal-Measures of Shropshire. (Nat. size.) The lamina has a well-defined median keel on the lower surface and on either side a groove in which sections of petrified leaves have demonstrated the occurrence of stomata (cf fig. 142). ii. Leaves and Leaf-cushions. All Lepidodendron leaves, so far as we know, possessed a single median vein only. In some species, as for example m Lepidodendron longifolium Brongn., they have the form of long 1 Bertrand, C. E. (91) p. 84 : derived from Trapi, by the side of, and ix^os, trace or foot-print.. 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 work.. Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press