SECT. II. TAXONOMY AND PHYTOGRAPUV. ] 49 



word a&eX^of (a brother) ; these bundles or brother- 

 hoods of stamens, being either one, two, or more than 

 two respectively. Where there is only one (in Mona- 

 delphia), the filaments must necessarily form a cylin- 

 drical tube round 'the pistil (fig. 97- ) The greater 

 portion of Diadelphia is composed of a large section of 

 a natural tribe, the Papilionacese, belonging to the natural 

 order Leguminosae. (See art. 136.) A small section of 

 the Papilionacea?, in which the filaments are perfectly 

 free from any adhesion, is classed under Decandria, 

 in the same way as a few of the Labiatae are placed 

 under Diandria. The remainder of this artificial class 

 is almost entirely composed of the few genera which 

 belong to the Fumariaceae and the Polygalese ; the 

 former having six, and the latter eight stamens, united 

 into two bundles. 



The class Polyadelphia is exceedingly small, (the genus 

 Hypericum forming its most prominent, feature,) and 

 the stamens are here placed in little tufts or bundles 

 round the pistil. 



The nineteenth class is also strictly natural, like the 

 fifteenth, coinciding with the natural order Compositse, 

 so named from the inflorescence being composed of a 

 dense mass of small flowers, or florets (as they are 

 here termed), closely invested by an involucrum. The 

 whole head, in popular language is called a single 

 flower. (Seefg. 87.) The name of the artificial class 

 signifies that the anthers are united, a-w (together,) and 

 7EVEO-K (generation). 



Although the several parts of the florets are very 

 minute, and the adhesion of the anthers into a tube 

 round the style not readily recognisable, yet there is 

 very little difficulty in referring any species of this 

 class to its right position. There are a few flowers in 

 some other natural orders, arranged in heads resem- 

 bling those of the Compositse, but their anthers are 

 free. 



The twentieth class is named from jury (a woman), 

 and avijp (a man) ; the centre of the flower not 

 L 3 



