CONTENTS. 



2, Adventitious or Secondary Root 

 Aerial Eoots 

 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 



Conical Root 



Fusiform or Spindle-shaped Root . 



Napiform or Turnip-shaped Root . 



Contorted or Twisted Root . 



Prsemorse Root .... 



Roots 



Section 3. 



1. General Description and Parts of the Leaf 



2. The Internal Structure of Leaves 



1. Aerial Leaves 



a. Fibro-vascular System . 



b. Parenchyma of Leaves . 



2. Submerged Leaves 



3. Insertion and Arrangement of Leaves 



1. Insertion .... 



2. Arrangement of Leaves on the Stem, or Phyllotaxy 



Alternate Leaves 



Opposite and Verticillate Leaves 



3. Arrangement of the Leaves in the Bud, or Verna 



tion 



4. Lamina or Blade. ...... 



Venation 



1. Varieties of Reticulated Venation . 



1. Feather-veined or Pinnately- veined 



2. Radiated or Palmately-veined. 



2. Varieties of Parallel Venation 



a. Straight-veined .... 



b. Curve-veined ...... 



