CHAPTER LXV. 



DICOTYLEDONS CONCLUDED. 



Topic X: Dicotyledons with united petals, flower 

 parts in four whorls. 



OEDEE POLEMONIALES. 

 1182. Lesson XIX. The mint family (Labiatse). The mint 



family contains a large number of genera and takes its common 

 name from the mints, of which 

 there are several species belong- 

 ing to the genus Mentha. In the 

 figure of the "dead-nettle" (La- 

 mium amplexicaule), which is also 

 one of the members of this family, 

 we see that the lobes of the irregular 

 corolla are arranged in such a 

 manner as to suggest two lips, an 

 upper and a lower one. From 

 this character of the corolla, which 

 obtains in nearly all the members, 

 the family receives its name of 

 Labialce. The calyx is five-lobed. 

 The stamens, four in number, 

 arise from the tube of the corolla, 

 and converge in pairs. The 

 ovary is divided into four lobes, 



and at the maturity of the seed these form four nutlets. 



6 94 



Fig. 583. 



