Text-book of botany, morphological and physiological . nsion of the phenomena most easily obtainedwhich must precede a closer examination of them. The definitions in the followingparagraphs are given from this point of view. Sect. 21. Leaves and Leaf-forming Axes\—The members of the plantwhich are called Leaves (Phyllomes) in Characeae, Mosses, Vascular Cryptogams, and ^ Niigeli u. Schwendener, Das Mikroskop, pp. 599 et seq. Leipzig 1869.—Hofmeister, Allge-meine Morphologie der Gcwebe, sect. 2. Leipzig 1S68.—^Pringsheim, Jahrb. fiir wissen. Bot. 484. Derselbe iiber Utricularia. Monatsbe
Text-book of botany, morphological and physiological . nsion of the phenomena most easily obtainedwhich must precede a closer examination of them. The definitions in the followingparagraphs are given from this point of view. Sect. 21. Leaves and Leaf-forming Axes\—The members of the plantwhich are called Leaves (Phyllomes) in Characeae, Mosses, Vascular Cryptogams, and ^ Niigeli u. Schwendener, Das Mikroskop, pp. 599 et seq. Leipzig 1869.—Hofmeister, Allge-meine Morphologie der Gcwebe, sect. 2. Leipzig 1S68.—^Pringsheim, Jahrb. fiir wissen. Bot. 484. Derselbe iiber Utricularia. Monatsber. der Berliner Akad. Feb. 1869.—Hanstein, Heft. I. Bonn 1870.—Leitgeb, Botan, Zeitg. no. 3, ii7i. K 2 132 EXTERNAL CONFORMATION OF PLANTS. Phanerogams, are related to the axis or stem from which they are derived in themanner described in the following paragraphs. (i) The Leaves always originate below the groiving apex of the stem as lateraloutgrowths, either singly or several at the same height, i. e. at an equal distance. Fig. 105.—Longitudinal section through the apical region of three primarj- shoots of Charafrag-ilis; t the apical cell, in whichsegments are fornied b3 septa; each segment being further divided by a curved septum into a lower cell no further divisiblewliich developes into an internode^^^, and an upper cell which produces a node ;«?« and the leaves. Each node-cellproduces a whorl of leaves of different ages. (For a more exact description, see Book II. CharaceK.)
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1875
