140 



CONSERVATIVE ORGANS. [LECT. IV. 



mately terminate in absorbing fibrils ; so that the 



root in its di- 

 visions resem- 

 bles the stem 

 and branches 

 inverted (fig. 

 i). This form 

 of root is the 

 most general 

 being that of 

 all trees and 

 shrubs, and al- 

 so of many her- 

 baceous plants; 

 for example, E- 

 lecampane, 



Inula Helenium, and Seneka, Polygala senega. 



The following are the only species : 



1. The Branched root (Radix ramosa), as 

 described under the genus. 



2. The Toothed root (Radix dentata) (fig. A), 



k. which is a fleshy caudex with 



short branches and teethlike 

 prolongations, as in Ophrys co- 

 rallorhiza. 



iii. The Articulated or 

 Jointed root, (Radix articu- 

 lata) is apparently formed of distinct pieces 

 united, as if one piece grew out of another, so as 



