142 



Plant Classification 



[CH. 



of groups of plants according to their chemistry has again 

 come to the fore, and, in the future, chemical characters 

 will probably be numbered among the recognised criteria 

 for use in elaborating schemes of classification. 



Text-fig. 67. "Gele VXom^^Tv" = Nuphar luleu?n Sm., 

 Yellow Waterlily [de I'Obel, KruydtbcEck, 1581]. 



In the history of botanical classification, the first 

 advance from the purely utilitarian standpoint was marked 



