16 ON SYSTEMS AND CLASSIFICATIONS. 



cording to their number. In general we count to six, and then say, 

 polygyria. If there should be several germens and but one style, 

 the style only is numbered. The orders are never fatten from the 

 germens except .when the style is wanting. The Orders of the 

 fourteenth class are taken from the fruit ; there are two, viz. Gym* 

 nospermia when the seeds are naked, and Angiospermia when 

 they are contained in a pericarp. Those of the fifteenth class are, 

 like the foregoing, taken from the fruit, with this difference, that 

 here there are no naked seeds but a Siliqua, and the Orders are 

 named accordiug to the size of this, siliculosa and siliquosa. In 

 the sixteenth, seventeenth, eighteenth, twentieth, twenty-first and 

 twenty-second classes, the Orders are denominated according to 

 the number of the stamens; in the 1 6th, 17th, 18th and COth, 

 they are numbered from Diandra upwards; in the 21st and 22d 

 from Monaudria. 



The 19th Class contains none but compound flowers, except a 

 very few. Linnaeus considers these flowers as a Polygamy, {poly, 

 gamia), and prefixes this word to the name of each Order in which 

 the compound flowers are contained; for example : 



Polygamia cequalis, when all the florets which a compound 

 flower contains are hermaphrodites, and similar in form, whether 

 they be ligulate or tubular. 



Polygamia superjlua, when the compound flower is radiate j 

 the disk bearing hermaphrodite florets ; and the ray, fertile florets. 



Polygamia frustanea, when the compound flower is radiate, 

 the disk consisting of fertile, hermaphrodite florets, and the ray of 

 barren female florets. 



Polygamia necessaria, when the compound flower is radiate, 

 the disk consisting of barren hermaphrodite florets, the ray offer- 

 tile female florets. 



Polygamia segregata, when in a compound flower besides the 

 common perianth, each floret is furnished with its own particular 

 calyx. >. 



Monogamia is an Order containing all the plants which accord- 

 ing to strict system belong to this class, though they are not com- 

 pound flowers. 



The plants of the 21st and 22d classes, as we have said already, 

 are divided into Orders according to the number of the stamens; 

 but besides these, here are two orders taken from the connection 



