. A general system of botany, descriptive and analytical. In two parts. Part I. Outlines of organography, anatomy, and physiology. Part II. Descriptions and illustrations of the orders. By Emm. Le Maout [and] J. Decaisne. With 5500 figures by L. Steinheil and A. Riocreux. Translated from the original by Mrs. Hooker. The orders arranged after the method followed in the universities and schools of Great Britain, its colonies, America, and India; with additions, an appendix on the natural method, and a synopsis of the orders, by Hooker. Botany. FUNDAMENTAL OEGANS. 129 cellular and vascular t
. A general system of botany, descriptive and analytical. In two parts. Part I. Outlines of organography, anatomy, and physiology. Part II. Descriptions and illustrations of the orders. By Emm. Le Maout [and] J. Decaisne. With 5500 figures by L. Steinheil and A. Riocreux. Translated from the original by Mrs. Hooker. The orders arranged after the method followed in the universities and schools of Great Britain, its colonies, America, and India; with additions, an appendix on the natural method, and a synopsis of the orders, by Hooker. Botany. FUNDAMENTAL OEGANS. 129 cellular and vascular than fibrous) predominates. The coloured and dense bundles, which form a more solid zone towards the periphery, are the lower portions of bundles in which fibres analogous to liber predominate; and, finally, the less compressed bundles which are usually seen outside of the coloured zone are these same fibres after having branched and spread out, and before being lost in the periphery, which is a cellular zone representing the bark. A monocotyledonous stem usually retains about the same diameter throughout. This is because the fibro-vascular bundles, gradually attenuated towards their lower extremity, do not, as in dicotyledons, unite and descend to the bottom of the stem ; hence, any two truncheons of a monocotyledonous stem, being equally rich in bundles, can differ but little in diameter. Soot.—In the embryo, the radicle is the simple cellular lower end of the caulicle, which elongates downwards as the latter ascends with its plumule and cotyledons. A monocotyledonous seed usually presents several radicles (fig. 642); these are not, however, naked like those of dicotyledons, but are originally enveloped in an outer layer (serving as bark), which they push forward and pierce, emerging from it as from a sheath; whence the name oicoleorhiza for this organ (fig. 642). Examples have been given of stems emitting accessory or adventitious roots from various parts of their surface;
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1873
