. Essentials of botany. Botany; Botany. 72 ESSENTIALS OF BOTANY outside of the -wood in early spring is a fact well known to the schoolboy who pounds the cylinder cut from an alder, willow, or hickory branch until the bark will slip off and so enable him to make a whistle. The sweet taste of this pulpy layer, as found in the white pine, the slippery elm, and the basswood, is a familiar evidence of the nourishment which the cambium layer contains. With the increase of the fibro-vascular bundles of the wood the space between them, which ap- pears relatively large in Fig. 40, be- comes less and l
. Essentials of botany. Botany; Botany. 72 ESSENTIALS OF BOTANY outside of the -wood in early spring is a fact well known to the schoolboy who pounds the cylinder cut from an alder, willow, or hickory branch until the bark will slip off and so enable him to make a whistle. The sweet taste of this pulpy layer, as found in the white pine, the slippery elm, and the basswood, is a familiar evidence of the nourishment which the cambium layer contains. With the increase of the fibro-vascular bundles of the wood the space between them, which ap- pears relatively large in Fig. 40, be- comes less and less, and the pith, which Fig. 44. Diagram to illustrate Secondary at first extended Growth in a Dicotyledonous Stem. ^^^^-^^ ^^^ toward iJ, the first-formed bark; p, mass of sieve-cells; „ „• f ifp, mass of sieve-cells between the original ^^^ Circumierence wedges of wood; /c, cambium of wedges of of the Stem, beCOmeS wood; ic, cambium between wedges; b, groups „r>TnrM-o«« infn of bast-cells;/A, wood of the original wedges; ^'Ompiehbeu luio ifh, wood formed between wedges; x, earliest thin plates SO as tO wood formed; M, pith. ^^^^ medullary rays. These are, as already stated, of use in storing the food which the plant in cold and temperate climates lays up in the summer and fall for use in, the following spring, and in the very young stem they serve as an important channel for the transference of fluids across the stem from. 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1908
