CONTENTS. 



2. Adventitious or Secondary Koot 

 Aerial Roots 

 Epiphytes or Air Plants 

 Parasites . 

 Annual Roots 

 Biennial Roots . 

 Perennial Roots . 

 The Root of Dicotyledonous Plants 

 The Root of Monocotyledonous Plants 

 The Root of Acotyledonous Plants 

 Forms of Roots .... 



Coralline Root 



Tuberculated Root 



Fasciculated, Clustered, or Tufted Root 



Nodulose, Annulated, and Moniliform Roots 



Conical Root 



Fusiform or Spindle-shaped Root 



Napiform or Turnip-shaped Root 



Contorted or Twisted Root . 



Praemorse Root 



Section 3. 



THE LEAF 



1 . General Description and Parts of the Leaf 



2. Insertion and Arrangement of Leaves 



1. Insertion 



2. Arrangement of Leaves on the Stem, or Phyllotaxy 



Alternate Leaves . . . • 

 Opposite and Verticillate Leaves 

 Vernation or Prafoliation 



3. The Internal Structure of Leaves 



1 . Aerial Leaves ... 



a. Fibro -vascular System 



b. Parenchyma of Leaves 



2. Submerged Leaves 



4. Lamina or Blade .... 



Venation 



1 . Varieties of Reticulated Venation 



a. True netted . 



b. Feather-veined 



c. Ribbed .... 



d. Radiated or Palmately-vcined 



2. Varieties of Parallel Venation 



a, Straiglit-vcined 



b. Curve-veined . 



