. Studies in fossil botany . Paleobotany. 436 STUDIES IN FOSSIL BOTANY and above this level no more bundles were received (see Fig. 164, C). The petiole, where it first detaches itself. •^SM Fig. 167.—Meduilosa'augHca. A. Transverse section of petiole, showing the numerous vascular bundles, ; ?, mucilage-canals ; hy, hypoderma, with sclerenchymatous ribs. The whole has the structure of " ; x about S. S. Coll. 636. (G. T. G.) B. Vertical section of leaflet, , vascular bundles of mid- rib, and lamina ; jj/.c, mucilage-canal. Palisade-tissue shown towar
. Studies in fossil botany . Paleobotany. 436 STUDIES IN FOSSIL BOTANY and above this level no more bundles were received (see Fig. 164, C). The petiole, where it first detaches itself. •^SM Fig. 167.—Meduilosa'augHca. A. Transverse section of petiole, showing the numerous vascular bundles, ; ?, mucilage-canals ; hy, hypoderma, with sclerenchymatous ribs. The whole has the structure of " ; x about S. S. Coll. 636. (G. T. G.) B. Vertical section of leaflet, , vascular bundles of mid- rib, and lamina ; jj/.c, mucilage-canal. Palisade-tissue shown towards upper surface. x 28. Phil. Trans, S. S. Coll. 691. from the stem, has the following structure (Fig. 167, A) : On the extreme outside we may find a layer or two of palisade-like tissue (rarely preserved), which probably served for assimilation. Within this is the broad hypo-. 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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