CLASSES. 23 



A flower is termed aggregate, when upon a 

 common receptacle there are many florets, each 

 elevated upon a peduncle or flower stalk, and 

 having its proper calyx ; anthers not adhering 

 together, as Scabious, fig. 7. 



It has been premised that all the seven parts 

 of fructification are not invariably present in every 

 flower. It must now be observed that the Stamens 

 and Pistils are never wanting in any plant, the 

 flowers of which are apparent ; but that they vary 

 in their number. In some flowers one Stamen 

 only is found ; in others two ; in others three, and 

 so forth ; and so it is with the Pistils. 



The Primary Linnean division of Vegetables 

 into Classes., depends upon the number, position, 

 and proportion of the Stamens. 



The Classes are twenty-four. 



The first eleven are characterised solely by 

 the number of the Stamens, and are thus named : 



Class 1. Monandria, one stamen, fig. 1, pi. 17. 



2. Diandria, two stamens, 2. 



3. Triandria^ three stamens, 3. 



4. Tetrandria, four stamens, 4. 



