488 



PKACTICAL BOTANY 



1 These plants are merely suggested. Pondweed {Potamogeton), water 

 weed (Elodea), or one of the species of Ranunculus with submerged, dis- 

 sected leaves, will answer well ;is representative aquatics. There are hun- 

 dreds of mesophytes from which to choose. Century plants (Agave), cacti, 

 aloes, or echeverias are good examples of xerophytes. 



