92 AN INTRODUCTION 



ria, Didelta, Centaurea*, Zoegea, Rudbeckia, Core- 

 opsis, Helianthus and Osmites. 



ORDER IV. POLYGAMJA NEC ESS ARIA, compre- 

 hending such plants as have the florets of the disk 

 male and those of the radius female. This order 

 contains fourteen genera, most of which are radiate, 

 viz. Filago, Micropus, Milleria, Baltimora, Othonna, 

 Hippia , Osteospermum, Calendula, Arctotis, Erio- 

 cephalus, Polymnia, Melampodium, Silphium and 

 Chrysogonum. 



ORDER V. POLYGAMIA SEGREGATA. This or- 

 der comprehends such plants as have many partial 

 cups contained in the common calyx, which sepa- 

 rate and surround the flosculi. This order contains 

 seven genera, Elephantopus, Sphaeranthus, Echinops, 

 Gundelia, Stoebe and Oedera. 



ORDER VI. MONOGAMIA, comprehending such 

 plants as have simple flowers. This order contains 

 seven genera, viz. Strumpfia, Seriphium, Corymbi- 

 um, Jasione, Lobelia, Viola and Impatiens. 



CHAP. III. 



OF THE TWENTIETH CLASS GyNANDRIA. 



THIS class consists of such plants as have sta- 

 mina growing either upon the style itself, or upon a 

 receptacle that stretches out into the form of a style, 



* The Corollulae of the Centaurea are all tubulose, but 

 those of the radius differ from those of the disk, which brings 

 it within the definition of a radiate flower; however, Linnaeus 

 in his description of the Centaurea, in the Genera Plantarum, 

 has not called the Corolla radiata, but tubulosa ditformis, 

 Tubulose of different forms. 



f All the flowers of this class have a monstrous appearance, 

 owing to the uncommon situation of the parts of the fructifi- 

 cation. 



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