170 I.INVKAN ARTIFICIAL SYSTEM. 



13. If the stamens and pistils are distinct in separate 

 flowers (F. 193.) on the same plant, the plant must be re- 

 ferred to the class moncecia. 



This class is only likely to be confounded with the order moncecia, 

 of the twenty-third class, but by a strict analysis of the flowers pro- 

 duced by plants of the class moncecia, you will not detect any which 

 produce both stamens and pistils in the same flower. The orders of 

 this class are easily understood. 



14. If on the other hand, the barren or stamen- bearing 

 flowers, are on one plant, and the fertile or pistil-bearing 

 flowers on another of the same species, (F. 194.) then 

 the plant must be arranged in the class dicecia. 



There is a probability of this class being mistaken for plants be- 

 longing to the two orders dicecia and triaecia of the class polygamia ; 

 you are therefore required to ascertain precisely, that there are no 

 united ftorvers on any species of the plant you are examining, and 

 if there are not, you have obtained a true dioseious plant. The 

 orders of this class are very simple, and easily understood. 



15. Having made the necessary examination, if the 

 flowers are mixed, you are certain the plant belongs to 

 the twenty-third class, or polygamia. 



To convince yourself that the polygamia class is the correct one, 

 you must not be content to examine different flowers on the same 

 plant, but yon must collect them from several plants of the same spe- 

 cies, otherwise you will be led to imagine the plant is of the class 

 monoenia or dioecia, or if yon should only chance to have plucked 

 the united fioners, of some of the classes established on a different 

 principle from the present one. Thus, the sycamore has united 

 flowers with barren or fertile flowers on the same plant, consequently 

 belongs to the first order of the class polygamia. The common ash- 

 tree has the different flowers on t mo plants of the same species, and 

 belongs to the second order ; whilst the fig-tree, has the different 

 flowers on tkret plants of the same kind, and is of the third order. 



