Text-book of structural and physiological botany . nt, be regarded as a distinct element, is often,in consequence of its similarity, treated as belonging to thefundamental tissue. Where the fibrovascular bundles areclosed [Vascular Cryptogams and Endogens] and cannottherefore increase in thickness, this tissue is generally de-veloped to the greatest extent (Fig. 95, i). In the woodyportions, the stem and root, of Conifers and Dicotyledons,the fibrovascular bundles of which are open, it occupies aless considerable portion of the entire structure. In thegreater number of such stems it forms
Text-book of structural and physiological botany . nt, be regarded as a distinct element, is often,in consequence of its similarity, treated as belonging to thefundamental tissue. Where the fibrovascular bundles areclosed [Vascular Cryptogams and Endogens] and cannottherefore increase in thickness, this tissue is generally de-veloped to the greatest extent (Fig. 95, i). In the woodyportions, the stem and root, of Conifers and Dicotyledons,the fibrovascular bundles of which are open, it occupies aless considerable portion of the entire structure. In thegreater number of such stems it forms a central /////, 68 Str^iictitral and Physiological Botany. which is connected with the bark by more or less largelydeveloped portions of cellular tissue, the medullary rays, (Fig. 95, IL, S^). In by far thegreater number of roots thefibrovascular bundles, on thecontrary, form a cylinder des-titute of pith and reaching thecentre, so that the fundamen-tal tissue is altogether absent,or, according to other au-thorities, is developed only
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyorkjwileysons
