166 



VENATION OF LEAVES. 



the dicotyledonous nature of a plant from the fibrous inter- 

 lacing of its vessels, as seen in the apple (fig. 105), 



Fio. 104. Germ of a monocotyledonous plant. 



or the monocotyledonous character in the smooth and parallel 

 veins of the gloriosa superba (fig. 106). 



FIG. 105. 



CONIFEKOTTS PLANTS. In some families of the dicotyle- 

 donous class, the cells, or tubes, are marked with spots or 

 glands (fig. 107). 



FIG. 106. 



