. Elements of plant anatomy;. Botany -- Anatomy. ANATOMY OF TISSUES. 137 There is, however, in many plants an actual separation of certain parts outside the periderm formation. (Fig. 59.) As before ex- plained, all portions outside the periderm gradually die for lack of food. Not all, however, are removed from the plant, certain portions of bark remaining to perform the functions of epider- mis, and some botanists refer to the bark as a third form of epidermis. In order to understand how some portions are. Fig. 5U. a cork layer separating bark scales, e and/large parenchymatic rind cells. 6 an
. Elements of plant anatomy;. Botany -- Anatomy. ANATOMY OF TISSUES. 137 There is, however, in many plants an actual separation of certain parts outside the periderm formation. (Fig. 59.) As before ex- plained, all portions outside the periderm gradually die for lack of food. Not all, however, are removed from the plant, certain portions of bark remaining to perform the functions of epider- mis, and some botanists refer to the bark as a third form of epidermis. In order to understand how some portions are. Fig. 5U. a cork layer separating bark scales, e and/large parenchymatic rind cells. 6 an outer zone of thick-walled, a one of thin-walled cork cells ; the latter tears easily, c is a layer with only the outer wall thickened, d phelloderni. separated and others are allowed to remain, it will be necessary to describe more fully the elements of the inner periderm which differ slightly from those already described. These elements may be tabulated as follows: Deep-seated Periderm. L Phellem Phellogen Phelloderm Cork. Phelloid. Initial or meristem layer. Inside layers, never corky nor lionified. The term phellem here is used for all the tissue cut off to- ward the circumference; that part of it whose walls become lignified is called phelloid, while all the cells cut off centrip-. 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 Gregory, Emily L. Boston, London, Ginn & Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotanya, bookyear1895
