CHAPTER FOURTH. 



COMPARING AND CLASSIFYING PLANTS. 



EXERCISE XXVIII. 

 Plant Characters and Affinities. 



You are now to take a step forward in the study oi 

 plants. Having acquired considerable knowledge of their 

 parts by direct observation, you will begin to compare 

 them to note the resemblances and differences of whole 

 plants, and, by these resemblances, to arrange or group 

 them in a systematic way. This is classification 



