Organography of plants, especially of the archegoniatae and spermaphyta . small leaves brought about there by the internal peculiarities of the familywhich beget \.\iQ possibility of development of larger leaf-surfaces. VENATION OF MONOCOTYLEDONES 341 see already an indication of a mid-vein, and at this point the bundlesappear to be clustered together, for they run at first parallel, and then bendout into the leaf-surface which is thicker also at this position than it ishigher up and at the sides. Let us assume now that the vascular bundlesare originally all nearly parallel in the leaf-primord
Organography of plants, especially of the archegoniatae and spermaphyta . small leaves brought about there by the internal peculiarities of the familywhich beget \.\iQ possibility of development of larger leaf-surfaces. VENATION OF MONOCOTYLEDONES 341 see already an indication of a mid-vein, and at this point the bundlesappear to be clustered together, for they run at first parallel, and then bendout into the leaf-surface which is thicker also at this position than it ishigher up and at the sides. Let us assume now that the vascular bundlesare originally all nearly parallel in the leaf-primordium, and that the growthin surface of the leaf proceeds from above downwards, first of all nearlyuniformly and then chiefly at the margins because it is in the lower part that the thicker middle portion is firstformed ; then the course of the bundlesin the upper part must be that which isdiagrammatically represented in , B. The first bundles laid downhave the ordinary course, and furtherdownwards in the leaf, progressively,more bundles were present in the middle.
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