ARTIFICIAL SYSTEM. 49 



as the divisions of the Calyx and Corolla, being fre- 

 quently multiplied by luxuriance of soil, to the great 

 delight of florists, but much to the inconvenience of 

 botanists. So also the Stamens and Pistils are often 

 transformed to Petals, which constitutes a double 

 Flower. 



In the Classes with separated Flowers, accidents 

 occur with regard to the situation of the Stamens or 

 Pistils. If the structure of the other parts of the 

 Flower be alike, in every individual, both these or- 

 gans are liable to meet in the same Flower; just as, on 

 the other hand, they occasionally are met with sepa- 

 rate, in Classes, or in some Species of Genera, to which 

 united Flowers naturally belong (65). Hence so great 

 a proportion of trees in hot climates, as well as of 

 grasses in all climates, are polygamous ; having the 

 characters of the 23d Class, as defined by its author 

 Linna3us. But if respect be always had to the acces- 

 sory parts of a Flower (53, 54), as well as the essen- 

 tial ones (58, 59), and those are found different in 

 structure, number, or otherwise, such Flowers must 

 remain permanently distinct. Such only would I ad- 

 mit into the Class Potygamia, by which measure bo- 

 tanists in tropical countries are relieved from one of 

 the greatest of inconveniences. 



I have even ventured to suggest, Introd. to Botany, 



ed. 3. 368, that the 21st, 22d, and 23d Classes of the 



* Linneean system might possibly be well reduced to 



one, under the name of Did'mia (already used by 



E 



