170 PLANT BIOLOGY 



III. SUMMARY OF A CLASSIFICATION OF THE PLANT 

 KINGDOM 



Division I Spore-producing plants. 

 Sub-division 1 Fungi (including bacteria, yeast, molds, 



mushrooms, rusts, smuts). 

 Sub-division 2 Algce (including Spirogyra, Pleurococcus, and 



sea weeds). 



Sub-division 3 Mosses and their relatives. 

 Sub-division 4 Ferns and their relatives. 



Division II Seed-producing plants. 



Sub-division 1 Gymnosperms (including pines, spruces, hem- 

 locks). . 



Sub-division 2 Angiosperms, composed of : 

 Class I Monocotyledons (e.g. corn, lilies, gladiolus). 

 Class II Dicotyledons composed of 160 or more families, 



one of which is 



Rose family composed of 14 genera, one of which is the 

 Pear genus composed of 3 species, one of which is the 

 Apple species, of which there are many varieties, e.g. 

 Baldwin, Greening, etc. 



