. Foundations of Botany. Botany. STRUCTURE OF THE STEM 97 These are 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 transfer- ence of fluids across the stem from bark to pith, or in the. fc Fig. 69. — Diagram to illustrate Secondary Growth in a Dicotyledonous Stem. Ii, the first-formed bark ; p, mass of sieve-cells ; ifp, mass of sieve-cells between the original wedges of wood ; fc, cambium of wedges of wood ; ic, cambium between wedges
. Foundations of Botany. Botany. STRUCTURE OF THE STEM 97 These are 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 transfer- ence of fluids across the stem from bark to pith, or in the. fc Fig. 69. — Diagram to illustrate Secondary Growth in a Dicotyledonous Stem. Ii, the first-formed bark ; p, mass of sieve-cells ; ifp, mass of sieve-cells between the original wedges of wood ; fc, cambium of wedges of wood ; ic, cambium between wedges ; b, groups of bast-cells ; fh, wood of the original Avedges ; if ft, 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. Boston, Ginn & company
Size: 1567px × 1594px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1901
