1-iO LINN*:AN ARTIFICIAL SYSTEM. 



plious plants, the flowers have upwards of twenty-fire 

 stamens, all unconnected with the calj x. 



Among a few others in this order, is the hypericum or St. John's- 

 wort, several species of which are natives of this country. The 

 stamens of these plants are united into three or five sets, correspond- 

 ing with the numher of the styles. 



CLASS XIX. SYNGENESIA. 



121. Character: This is a very extensive class, 

 comprehending for the most part, those plants which pro- 

 duce compound flowers. With these the anthers arc itnitl 

 into a cylinder or tube, whilst the filaments, by which 

 they are supported, are separate and distinct. (F. 5.) 



The class yngenesia, is a very natural assemblage of plants. It 

 embraces the great family of compound flowers, which is, unques 

 tionahly, a natural tribe, essentially distinct from plants with simple 

 flowers. The essence of these compound flowers is said, by Lin- 

 naeus, to consist in the two circumstances of the union of the anther, 

 into a cylinder, and a single seed placed below the receptacle, and 

 attached to each floret. Most of the plants of this class, are re- 

 ferred by Liunteus to his natural order composites. 



122. Division : The class syngesia is divided into 

 five orders ; viz. polygamia ccqualis, polygamia super/tint, 

 polygamia frustranea, polygamia necessaria, and poh.j^n- 

 mia scgregata. They are all founded on the structure 

 of the flower, 



123. Polygamia tequalis:In the plants of this order, 

 the florets or partial flowers are all perfect or n>iill, 

 tlutt is, furnished with their own perfect ttumciis and 



