Text-book of structural and physiological botany . T^.p .„2 —A Part of a transverse section through the stem of Bryoni^ aiha o epi-dermis ; c outer cortex (collenchyma) ; R inner cortex ; v ring of kgnified cells ;r parenchyma of the stem ; G vascular bundle ( x 80).. ,1,^;^^.^° °^f^^, ^^^^^^ collenchyma); r inner cortex; s T ^^^ ^^^^^^^^ bundle ; c cambium of the thickening-ring ;thl^nrfZTr^ ; ^y^^P-Port^o f the vascular bundle ; b the bast formed fromthe mtermediate cambium ; z medullary ray ; m pith (x 120) 360 Structural and Physiological Botany, branched off from the
Text-book of structural and physiological botany . T^.p .„2 —A Part of a transverse section through the stem of Bryoni^ aiha o epi-dermis ; c outer cortex (collenchyma) ; R inner cortex ; v ring of kgnified cells ;r parenchyma of the stem ; G vascular bundle ( x 80).. ,1,^;^^.^° °^f^^, ^^^^^^ collenchyma); r inner cortex; s T ^^^ ^^^^^^^^ bundle ; c cambium of the thickening-ring ;thl^nrfZTr^ ; ^y^^P-Port^o f the vascular bundle ; b the bast formed fromthe mtermediate cambium ; z medullary ray ; m pith (x 120) 360 Structural and Physiological Botany, branched off from the stem together with the leaves at thetime when the latter first began to be formed. The circum-stance that branches of the vascular bundles which pass fromthe stem into the leaves—the so-called leaf-traces—do notbend into the leaf immediately that they branch off, butoften remain as a separate bundle running through a con-siderable length of the stem, causes the appearance of thevascular-bundle-system to be often very complicated, es-pecially when several leaf-traces which have branched offfrom different cauline bundles enter the same leaf In Fig. 473 we have a diagrammatic representation, after Nageli,of the course of the vascular bundle through twenty-
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyorkjwileysons
