CLASSES. 6f 



By Union of the Anthers. 



19. SYNGENESIA, stamens united by their anthers- 

 into a tube, flowers compound. Ex. Dandelion, Sun- 

 flower, Thistle, &c. 



Observation. A very natural and extremely numerous class. 

 By Union of the Stamens and Pistils* 



0. GYNANDRIA, stamens united with or growing 

 out of the pistil. Ex. Orchis and Ladies' slipper, 

 Cypripedium. 



By the Situation of the perfect 9 barren 9 and fertile Flowers. 

 31. MONOECIA, stamens and pistils in separate flow- 

 ers on the same plant. Ex. Indian Corn, Zca ; Hazel, 

 Corylus ; Alder, Mnus. 



Observation. In India Corn, the spike or spindle, so called, at top 

 bears the stamens, and the ear the pistils, the styles of which are 

 "what are called the silk. 



2. DIOECIA, stamens and pistils in separate flow- 

 ers on two separate plants of the same species. Ex. 

 Willow and Hop. 



Observation. These two last classes are natural when the barren 

 flowers have, besides the difference in their essential organs, a 

 different structure from the fertile ones in other raspects ; but not 

 so when they have the same structure, because then both organs 

 are liable to meet in the same flower. Smith. 



3. POLYGAMIA, stamens and pistils separate in 

 some flowers, united in others, either on the same 

 plant, or on two or three separate ones of the same 

 species. Ex. Maple, #eer. 



Observation. As many plants do, occasionally, have their sta- 

 mens and pistils separate in some flowers, Smith proposes to 

 confine this class to those in which the three kinds of flowers dif- 

 fer in their general structure. 



By Concealment. 



4. CRYPTOGAMIA, stamens and pistils obscure. Ex. 

 Ferns, Lichens, Seaweeds, and Mushrooms. 



