THE CLASSIFICATION AND NAMING OF PLANTS 6,^ 



the vascular bundles are scattered throughout the pith 

 (examples: cereals, onions, asparagus, lilies); (2) Dicotyle- 

 dones, in which the seeds have two cotyledons, the flower 

 parts are in fours or fives, the leaves are netted-veined, and 

 the vascular bundles are in the form of a cylinder about the 

 pith (examples: buckwheat, beet, apple, cherry, mustard, 

 cotton, melon, potato).' 



Each of these subclasses is further subdivided. A com- 

 plete classification of some plant, e.g., common alfalfa, will 

 give the principal subdivisions: 

 Spermatophyta, 

 Angiospermse, 

 Dicotyledones, 

 Order Rosales, 



Family Leguminosae, 

 Genus Medicago, 

 Species Medicago sativa. 

 The order ending is usually "ales." Orders are subdivided 

 into families. The family ending is commonly "acea" or 

 "cB." Families are split up into genera, and genera into 

 species. The number of families, genera, and species may 

 be large or small. 



THE PLANT KINGDOM 



Thallophytes— " Thallus plants. " 



Myxomycetes — slime molds or slime fungi. 

 Schizophytes — "splitting plants. " 



Cyanophyceae — blue-green algae. 



Schizomycetes — bacteria. 

 Algae— pond scums, sea weeds, etc. 



Chlorophyceae — green algae. 



Phaeophyceae — brown algae. 



Rhodophyceae — red algae. 



