216 STUDY OF PLANTS. 



The various groups given above are suggested 

 merely as examples, and innumerable others may be 

 made to suit the reader's convenience, and as one of the 

 means of becoming familiar with many species which 

 are now everywhere and daily passed by unnoticed on 

 the farm. Groups, for instance, might be formed of 

 grasses best adapted for raising cattle, grasses best 

 adapted for raising horses, those best adapted for graz- 

 ing sheep, and those best adapted for milch cows and 

 dairy farming. 



