. Foundations of botany. Botany; Botany. STRUCTURE OS THE STEM 97 These are of use in storing the food which the plant in cold and temperate cUmates 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 transfer- ence of fluids across the stem from hark to pith, or in the. fc Fig. 69. —Diagram to illustrate Secondary Growtli in a Dicotyledonous Stem. H, the first-formed bark; p, mass of si^ve-cells ; ifp, mass of sieve-cells between the original wedges of wood; /c, cambium of wedges of wood; ic, cambium between wed
. Foundations of botany. Botany; Botany. STRUCTURE OS THE STEM 97 These are of use in storing the food which the plant in cold and temperate cUmates 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 transfer- ence of fluids across the stem from hark to pith, or in the. fc Fig. 69. —Diagram to illustrate Secondary Growtli in a Dicotyledonous Stem. H, the first-formed bark; p, mass of si^ve-cells ; ifp, mass of sieve-cells between the original wedges of wood; /c, cambium of wedges of wood; ic, cambium between wedges ; 6, groups of bast-cells ; fh, wood of the original wedges ; ifh, wood formed between wedges ; x, earliest wood formed; M, pith. reverse direction. On account, perhaps, of their impor- tance to the plants, the cells of the medullary rays are among the longest lived of all plant-cells, retaining their vitality in the beech tree sometimes, it is said, for more than a hundred, years. After the interspaces between the first fibro-vascular bundles have become filled up with wood, the subsequent. 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; Eastwood, Alice, 1859-1953. Boston, Ginn & Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1901
