LINN/KAN ARTIFICIAL SYSTEM. 155 



tain, that some plants may have flowers with these 

 organs distinct in separate flowers, as well as both in 

 the same flower. According to the nature of these 

 differences, there are three classes ; viz. monoecia, 

 dicecia, and polygamia. 



CLASS XXI. MON02CIA. 



138. Character: The plants of this class, are par- 

 ticularly distinguished by their producing some flowers 

 with stamens only, and some flowers with pistils only, 

 botli growing on the same plant. (F. 193.) 



The vegetables of the class monoecia, are arranged by Linnaeus 

 under very different natural orders. Zannichellia belongs to the 

 order inundatce. Anguria, trichosanthes, momordica, cucurbits, 

 cucumis, sicyos, and bryonia, are referred to the order cucurbitacece. 

 Betula, fagus, quercus, juglans, corylus, carpinns, and platanns, are 

 of the order amentacece. Finns, cupressus, thuja, &c. to the coni- 

 fertE. Zea, tripsacum, coix, olyra, zizania and pharns, are grasses, 

 and belong to the order gramina. Carex, sparganium and typha 

 are referred to the natural order calamariee. 



139. Division: There are nine orders in this class ; 

 viz. monandria, diandria, triandria, tetrandria, pentandria, 

 hexandria, polyandria, monadelphia andpolyadelphia ; all 

 established on the number, or some other circumstance, 

 connected with the stamens. 



140. Monandria: This order claims those plants of 

 the monoecious character, which produce barren flowers 

 with but one stamen. 



The zannichellia or horned-pondweed, and the celebrated bread- 

 fruit tree or artocarpus, may be considered as the most correct 

 illustrations. 



