APPENDIX IV. 

 OUTLINE OF CLASSIFICATION. 



In the foregoing work no endeavor has been made to present 

 any scheme of classification, but only to develop certain principles 

 in logical fashion. As a supplement the following general classi- 

 fication, adapted mainly from Strasburger, Noll, Schenck and 

 Schimper's Lehrbuch der Botanik, may be useful in showing the 

 relationship of the more important plants named in the text and 

 appendices. 



All classification is more or less artificial. The purpose of such 

 an outline is to indicate roughly the present knowledge of kinship 

 among plants. Even were knowledge perfect it would naturally 

 be impossible to do this in a linear arrangement such as is neces- 

 sary in a book. Moreover, knowledge is far from complete. It 

 is to be expected, for example, that ultimately botanists will be 

 able to express much more accurately the relationship between 

 the groups of fungi and the algae than is now possible. Then, 

 the various groups of fungi will be ranked alongside the green 

 plants to which they are most akin, as is now done in the Schizo- 

 phyta, instead of being constituted a class by themselves. 



The following classification differs more or less from all others 

 in details. Like them, it is merely tentative, and will be modified 

 as knowledge increases. Only in the most general divisions will 

 all schemes be found similar. 



Subkingdom I. THALLOPHYTA. Thallophytes. 



Class I. UyxomyceteB. Slime molds. 

 Class II. Schizophyta. Fission plants. 



Order l. Schizophycea. Fission algae. Blue-green algse. 



Nostoc. Rivularia. Oscillaria. 

 Order 2. Schizamycetes. Fission fungi. 

 Bacteria. 



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