. Studies in fossil botany . Paleobotany. 473 STUDIES IN FOSSIL BOTANY which are radially arranged ; the wedge-shaped groups of secondary tracheides are separated from one another by medullary rays, usually more than one cell in thickness. The sculpturing of the tracheides consists of several rows of crowded circular pits, limited to the Fig. 176.—Calamopitys Satumi, Unger. Transverse section of stem, .r, primary xylem- strands ; .r-, secondary wood ; , outer cortex, with fibrous strands ; Lt, double- leaf-traces ; pet, petiole-base, containing six bundles ; , sclerenchyma at juncti
. Studies in fossil botany . Paleobotany. 473 STUDIES IN FOSSIL BOTANY which are radially arranged ; the wedge-shaped groups of secondary tracheides are separated from one another by medullary rays, usually more than one cell in thickness. The sculpturing of the tracheides consists of several rows of crowded circular pits, limited to the Fig. 176.—Calamopitys Satumi, Unger. Transverse section of stem, .r, primary xylem- strands ; .r-, secondary wood ; , outer cortex, with fibrous strands ; Lt, double- leaf-traces ; pet, petiole-base, containing six bundles ; , sclerenchyma at junction of petiole with stem, x about 4. After Solms-Laubach. radial walls in the case of the secondary elements, but occurring on all sides of those tracheides which belong to the primary wood. The phloem is preserved in one fragment, and contains bast-fibres, in addition to the elements of the soft bast. The wide inner cortex is parenchymatous, while its outer zone is strengthened by strands of 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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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondonaandcblack
