ORDERS. 31 



The orders of tlic twentieth, twenty -first, and 

 twenty-second classes, (Gynandria, Monoecia, 

 and Dioecia) are almost entirely founded on the 

 number of the stamens, as JSIonandria, one 

 stamen, T)'iandna, two stamens, &c. 



The three orders of the twenty-third class, (Poly- 

 gamia) are founded upon the principle of the 

 two preceding classes. 



Order 1. JMonoecia, flowers either united or sepa- 

 rate on the same plant. 



2. Dioecia, the different kinds of flowers 



on two different plants. 



3. Trioecia, the different kinds of flowers 



on three different plants. 



The orders of the twenty-fourth class, (Cryptoga- 

 mia) are 



1. Filices, Ferns. 



2. Miisci, Mosses. 



3. Hepatica', Liverworts. 



4. AIga\ Sea weeds. 



5. Lychenes, Lychens. 



G. Fungi, Mushrooms. 



