FROM CLASS TO NATURAL ORDER. 213 



CHAPTER XXXVI. 



FROM CLASS TO NATURAL ORDER. 



r 



Fig. 175. Coltsfoot. ( Tussilago farfara). c top' of 

 flower stalk, showing reflexed involucre, receptacle 

 and florets. d single floret (magnified), of the 

 margin, ligulate. e single floret of the disk, tubular 

 (magnified.) 



YOU will now b able, I think, to find out to which 

 of the three classes a plant belongs. Next you want 

 to find its " natural order'' But as there are about 



