NUCULIFER^]. 



539 



flowering. Scutettaria (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. NEPETE.E, '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. 578. Mentha aquatica, var. crispa. 



4. SATUREIEJ], 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, the 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- 



