The Orders of the great natural 19th Class, 

 Syngenesia, are marked by the united or se- 

 parated, barren, fertile, or abortive, nature of 

 the florets. 



1. Polygamia iEQUALis. Florets all per- 

 fect or united, that is, each furnished with 

 perfect Stamens, a Pistil, and one Seed. 



%. Polygamia supeiiflua. Florets of 

 'the disk with Stamens and Pistil ; those of 

 the radius with Pistil only, but each, of 

 both kinds, forming perfect Seed. 



3. Polygamia frustiia^ea. Florets of 

 the disk as in the last ; those of the radius 

 with merely an abortive Pistil, or with not 

 even the rudiments of any. This is a bad 

 Order, for reasons hereafter to be ex- 

 plained. 



4. Polygamia necessaria. Florets of 

 the disk with Stamens only, those of the 

 radius with Pistils only. 



5. Polygamia segreg ata. Several flow- 

 ers, either simple or compound, but with 

 united anthers, and with a proper calyx, 

 included in one common calyx. 



