CHAPTER XXII 



THE PLANT PHYLA 



WITH THEIR CLASSES, ORDERS, FAMILIES AND IL- 

 LUSTRATIVE GENERA 



The Plant World is here regarded as readily separable into 

 fourteen Phyla (often called "Branches" or "Divisions"). 

 These are subdivided into Classes, and these again into Orders, 

 and the latter into Families. The latest enumeration of the 

 species of plants shows that we now know approximately a 

 quarter of a million recognizable forms. These numerical data 

 may be shown concisely in tabular form as follows: 



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