NUCULIFEEJ:. 



539 



flowering. Scutellaria (Skull-cap); the two lips of the calyx are 

 entire, the upper lip has a large spur, and drops off on the ripen- 

 ing of the fruit. The flowers are generally solitary and turned 

 to one side. Prunella (Heal-all) ; the calyx is compressed, its two 

 lips are strongly dentate, the upper lips closing slightly round the 

 under. The stamens have a tooth-like projection beneath the 

 anthers. 



3. NEPETEJ;, CATMINT GROUP. 13-15 nerves in the calyx; 

 this deviates from the other groups in the posterior stamens being 

 the longer. The upper lip is slightly arched. Nepeta (Catmint) > 

 also Glechoma (Ground Ivy), with regular, and Dracocephalum 

 with irregular calyx. 



FIG. 573. Mcntlia aqnatiea, var. orispa. 



4. SATUREIE.E, MINT GROUP. The upper lip is flat, most fre- 

 quently ovate, or almost spherical, and emarginate (Fig. 578). 

 The calyx is most frequently 5-10-nerved. 4 stamens, tlis anterior 

 being the longer; rarely, 2 stamens only. Mentha (Mint, Fig. 

 578) has a regular, 5 -dentate calyx, a small, almost regular, 4- 

 partite corolla, and 4 erect stamens of nearly equal size. The 

 verticillasters are many-flowered, and are often collected into 

 cylindrical inflorescences. Herbs. Lycopus (Gipsy- wort); corolla 

 almost regular. 2 stamens, the posterior lateral ones are wanting. 

 Preslia : 4-dentate calyx, 4-partite, regular corolla ; 4 stamens of 

 equal size. Thymus (Thyme, Fig. 575) has a strongly bilabiate 

 calyx, the throat being closed by a whorl of hairs (Fig. 575 B). 

 The corolla is distinctly labiate. Under- shrubs, with small entire 

 leaves; verticillasters few-flowered and separate. Origanum (Mar- 

 joram) ; spike or capitate inflorescences with the flowers solitary 



