Plate XII. 



LEAF FORMS. 



IT 



General subject Name each of them. Instances of each. Define Cordate between figs. 2 and 3 4 and 9 18 and 14 ? Howisflg. 8 17 18 f Howls the 

 M)Yt Spatulate Acerose Sagittate Khomboidal Connate. Difference Venation in these leaves ? "W hat, then, do they indicate, Endogens or Exogens ? 



