RULES IN NOMENCLATURE. 193 



497. The Natural System, then, with all its divis- 

 ions, groups, and subordinations, may be exhibited 

 at one view, as follows : 

 KINGDOM, 

 SUB-KINGDOMS, 

 CLASSES, 

 COHORTS, 

 ORDERS, 

 SUB-ORDERS, or 

 TRIBES, 

 GENERA, 

 SUB-GENERA, 

 SPECIES, or 

 RACES. 



CHAPTER III. 



RULES IN NOMENCLATURE. 



498. The Names of the Orders are Latin adjectives, 

 feminine, plural (to agree with plantce, plants, under- 

 stood), usually derived from the name of the most 

 prominent, or leading genus, by changing or prolong- 

 ing the termination into acece, as Hosacece, the Rose 

 tribe, Papaveracece, the Poppy tribe, from Rosa and 

 Papaver. Earlier names, however, derived from some 

 leading character in the Order, and with various ter- 

 minations, are still retained. Thus, Composite^, with 

 compound flowers ; Labiatce, with labiate flowers. 



499. Generic Names are Latin substantives, arbi- 

 trarily formed, often from some medicinal virtue, either 

 supposed or real, or from some obvious character of 

 the genus ; sometimes from some peculiar form of the 

 flower, or from the name of some distinguished bot- 



