82 LABIATE. 



glabrous Anisomdes. 



^ Corolla strongly or slightly 2-lipped, upper lip often 

 concave. Anthers with linear narrow cells. Stamens 2. 



Sa Iv ia . 



^** Corolla 2-lipped or nearly actinomorphic, with slightly 

 different lobes. Upper lip, if exists, flat or very slight- 

 ly concave. Anthers ovate. 



D Calyx 10-13-rarely 15-nerved. Corolla 2-lipped. 

 Stamens ascending under the upper lip. 

 f Corolla exserted recurved ascendent. ...Melissa. 



ff Corolla straight Calamintka. 



nn Calyx 10-13-nerved. Corolla 2-lipped. Stamens 

 patent from the base, straightly spreading, nearly 

 equal Origanum. 



DDn Calyx 10-13-nerved. Corolla nearly actinomorphic. 

 Stamens spreading straight from the base and 

 nearly equal, 

 f Fertile stamens 2, the anterior with divaricate 



cells. Nutlets with flat truncate top 



Lycopus. 



ff Stamens 4, with parallel cells. Nutlets with 



rounded top Mentha. 



IOD Calyx 10-nerved. Corolla differently 2-lipped or 

 nearly actinomorphic. Stamens erect spreading, 

 didynamous. 



t Fertile stamens 4, erect, spreading, the anterior 

 longer. Corolla short 5-fid Per ilia. 



tf Fertile stamens 2, the posterior ; the anterior 

 reduced to staminodes. Corolla slightly 2-lip- 

 ped ; upper lip emarginate : lower lip 3-fid 

 Mosla. 



2. Anthers rounded, with cells which are connate into one cell 



