LABI ATM. 



275 



Topic IX: Dicotyledons with united petals, flower 

 parts in four whorls. 



Order Tubiflorje. 



437. Lesson XVII. The mint family (labiatae).— 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 ' ' 



Fig. 235. 

 Whortleberry (Gaylussacia re- 

 si no s a). 



Fig. 836. 

 Spray of dead-nettle (Laminum am- 

 plexicaule), leaves and flowers. 



(Lamium 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 

 Labiatce. The calyx is five-lobed. The stamens, four in 

 number, arise from the tube of the corolla, and converge in 



