HOOTS 
97 
FIG. 92. 
A tropical aroid (Anthurium), showing its large leaves, and bunches of 
aerial roots. 
soil they usually do not penetrate or enter into any soil re- 
lation. Such pure water roots may be found dangling from 
the under surface of the common duck weeds, which often 
cover the surface of stagnant water with their minute, 
green, disk-like bodies. 
