Organography of plants, especially of the archegoniatae and spermaphyta . oring-organs, and they may also serve forthe conduction of food-material (Fig. 98). Oblique walls inrhizoids. The obliquedirection of the wallsin the rhizoids is a re-markable fact whichinvites an explanationboth from the biologicaland from the morpho-logical side. First of all it maybe noted that we haveillustrations of a likefeature in plants out-side the group of the rhizoids of Charathe walls are not simple transverse walls but are somewhat oblique, yet they always join onto the walls they intersect at a rig
Organography of plants, especially of the archegoniatae and spermaphyta . oring-organs, and they may also serve forthe conduction of food-material (Fig. 98). Oblique walls inrhizoids. The obliquedirection of the wallsin the rhizoids is a re-markable fact whichinvites an explanationboth from the biologicaland from the morpho-logical side. First of all it maybe noted that we haveillustrations of a likefeature in plants out-side the group of the rhizoids of Charathe walls are not simple transverse walls but are somewhat oblique, yet they always join onto the walls they intersect at a right angle. This, as Errera ^ was thefirst to point out, and as de Wildeman - has also shown, is also the casein Musci. The walls originally are set on to the outer wall of the thread ata right angle, but they have a double curvature; they are not laid downas flat plates and then displaced, but from the beginning have this doublecurvature. When they, at a later period, appear as placed in an obliqueposition, that is due to subsequent growth. It is in this way, as various. Fig. 98. Funaria hygrometrica. A, germinating spore ; ex, ; kn, buds ; r, rhizoids; f, spore. MagTiified. Lehrb. ^ Errera, tjber Zellenformen und Seifenblasen, in Biologisches Centralblatt, vii (iSSS), p. 729. ^ De Wildeman, Etudes sur Iattache des cloisons cellulaires, in Memoires couronnes, pablies parIAcademie Royale des Sciences de Belgique, 1S93. ^ I have not been able to convince myself in my study of the process of division that the walls arealways set on at right angles to the outer wall. Certain is it that the wall is from the beginningoblique to the long axis, and on one side I often saw plainly that it was set on at a right angle, but,that the walls are set on throughout at right angles, I am not satisfied. Moreover, as the example ii8 GERMINATION OF THE SPORE IN MUSCI authors have shown ^ that the surface by which two superposed cells touchis increased, and that a more rapid interchan
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