. Elements of botany. Botany; Botany. STRUCTURE OF THE STEM. 63 After the inter-spaces between the first fibro-vascular bundles have become filled up with wood, the subsequent growth must take place in the manner shown in Fig. 53. The cambium of the original wedges of wood, fc, and the cambium, io, formed between these wedges, continues to grow from its inner and from its outer surface, and thus causes a permanent. Fig. 53. —Diagram to illustrate Secondary Growth in a Dieotyledonons Stem. i?, the first-formed bark; j>, mass of sieve-cells ; ifp^ mass of sieve-cells between the original wedg
. Elements of botany. Botany; Botany. STRUCTURE OF THE STEM. 63 After the inter-spaces between the first fibro-vascular bundles have become filled up with wood, the subsequent growth must take place in the manner shown in Fig. 53. The cambium of the original wedges of wood, fc, and the cambium, io, formed between these wedges, continues to grow from its inner and from its outer surface, and thus causes a permanent. Fig. 53. —Diagram to illustrate Secondary Growth in a Dieotyledonons Stem. i?, the first-formed bark; j>, mass of sieve-cells ; ifp^ mass of sieve-cells between the original wedges of "wood; /c, cambium of "wedges of wood ; ic, cambium between wedges; 5, groups of bast-cells; /A, wood of tlie original wedges; ifh^ wood formed between "wedges ; x, earliest wood formed; M, pith. increase in the diameter of the stem and a thickening of the bark, which, however, usually soon begins to peel off from the outside and thus soon attains a pretty constant thickness.' 86. Grafting.—When the cambium layer of any vigor- ously growing stem is brought in contact with this layer in ^ See Gregory's Plant Anatomy, Chapter 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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