. Practical botany, structural and systematic, the latter portion being an analytical key to the wild flowering plants, trees, shrubs, ordinary herbs, sedges and grasses of the northern and middle United States east of the Mississippi. Botany. 82 PRACTICAL BOTANY. spaces known as mtercellular spaces, or, in case they are large and regular, intercellular passages, or air^assages. They may contain special secretions, and in all probability the milic-vessels are, primarily, regular intercellular air- passages, instead of being composed of special cells. Ihe PUurenchyma and the Parenchyma together
. Practical botany, structural and systematic, the latter portion being an analytical key to the wild flowering plants, trees, shrubs, ordinary herbs, sedges and grasses of the northern and middle United States east of the Mississippi. Botany. 82 PRACTICAL BOTANY. spaces known as mtercellular spaces, or, in case they are large and regular, intercellular passages, or air^assages. They may contain special secretions, and in all probability the milic-vessels are, primarily, regular intercellular air- passages, instead of being composed of special cells. Ihe PUurenchyma and the Parenchyma together form the mainhulh of almost oilplants.). Cut VI. Piece of a woody bundle, or compound fibre of an endogen ; a, Parenchyma cells; J, ducts witli rings, called annular cells; c, spiral ducts ; d, a dotted duct; e, wood- cells. 74. The aekangement of the elementaet cegans on the surface of plants constitutes the Epidermial system, that is to say, the epidermis, stomata, hairs, glands, cuticle, etc. (Out VII.) The Epidermis is a membrane, foinned of a layer of united, and commonly tabular, empty cells. The Mosses only excepted, it invests all plants, and all their parts, save the extremities, the stigma and the rootlets, and may be detached untorn from the underlying tissue. In certain places, especially on the lower surface of the leaves, it is pierced with a great many small openings, called stomates or hreathing pores. Prominences are formed by elon- gated epidermial cells, and are called hairs, glands, tuber- cles, warts, stings, "bristles, pricMes, 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 Koehler, August. New York, H. Holt and Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1876
