. Elements of botany. Plants. 60 ELEMENTS OF BOTANY. The green layer of the bark in young shoots does much toward collecting and preparing the food of the plant from, air and water, but this work may be best explained in connec- tion with the study of the leaf, Chapter XII. I W Fig. 50.—Cross-Section of Fir Wood. s, a resin passage ; m, medullary rays. (Much magnified.). Fig. 51.—Longitudinal Radial Section tlirougli a Rapidly Growing Young Brancli of Pine. f, t", bordered pits on wood-cells ; st, large pits where medullary rays lie against wood- cells, pluch magnified.) Finally, the cork
. Elements of botany. Plants. 60 ELEMENTS OF BOTANY. The green layer of the bark in young shoots does much toward collecting and preparing the food of the plant from, air and water, but this work may be best explained in connec- tion with the study of the leaf, Chapter XII. I W Fig. 50.—Cross-Section of Fir Wood. s, a resin passage ; m, medullary rays. (Much magnified.). Fig. 51.—Longitudinal Radial Section tlirougli a Rapidly Growing Young Brancli of Pine. f, t", bordered pits on wood-cells ; st, large pits where medullary rays lie against wood- cells, pluch magnified.) Finally, the corky layer of the bark serves to a considerable extent as a protection against sudden changes of temperature and aids greatly in preventing evaporation of water on its way along the stem. ""^. 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; Bergen, Joseph Y. (Joseph Young), 1851-1917. Bergen's Botany: key and flora, Pacific coast ed. Boston : Ginn
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectplants, bookyear1896
