LABIATE. (MINT FAMILY.) 293 



*- 4- Stamens ascending or arcuate, often more or less converging and sometimes ascend- 

 ing parallel under the erect upper lip of the corolla ; anther-cells oblique or divaricate : 

 calyx 12 to 15-nerved. 



6. Calamintlia. Calyx oblong or tubular, often gibbous, bilabiate ; the upper lip 



3-toothed or 3-cleft, the lower 2-parted. Corolla with a straight tube mostly ex- 

 ceeding the calyx, and a commonly enlarging throat. Stamens 4, ascending parallel 

 under or beyond the upper lip, or conniving in pairs. 



7. Hedeoma. Calyx from tubular to oblong, usually gibbous, more or less bilabiate 



or unequally 5-toothed, mostly 13-striate, hairy or villous-bearded in the throat. 

 Antheriferous stamens 2, ascending parallel under the upper lip ; the posterior pair 

 either none or sterile. 



Tribe III. Antheriferous stamens only 2, straight or commonly parallel-ascending ; the 

 anther with narrow cells, which are either widely separated on the upper and lower 

 ends of a linear or filiform connective, or the lower cell wanting or deformed, or the 

 two cells confluent into one linear cell : corolla bilabiate. MONARDE^. 



8. Salvia. Calyx bilabiate. Corolla with upper lip erect, straight or falcate, usually 



concave : the lower spreading, its middle lobe often emarginate. Connective com- 

 monly linear or filiform, transverse and articulated on the short filament 



9. Monarda. Calyx elongated-tubular, mostly 15-nerved, regular or nearly so, almost 



equally 5-toothed. Corolla with slender tube or dilated at the throat ; the upper lip 

 erect, entire or emarginate ; the lower spreading, 3-lobed, its middle lobe larger or 

 longer, retuse or emarginate. Anther-cells contiguous and divaricate, more or less 

 connate or confluent at their junction, so as to imitate a single linear cell. 



Tribe IV. Stamens 4, both pairs fertile ; the posterior (inner or upper) pair surpassing 

 the anterior : corolla distinctly bilabiate : calyx usually 15-nerved ; the upper teeth 

 or lip commonly larger or longer. NEPETE^C. 



10. LiOpb.antb.us> Stamens divergent or distant, exserted ; the upper pair usually de- 



clined ; the lower or shorter pair ascending : the anther-cells parallel or nearly so. 

 Corolla with tube not exceeding the oblique, 5-toothed calyx ; upper lip nearly erect, 

 2-lobed at the apex ; lower spreading, its broad middle lobe crenate. 



11. Dracocephalum. Anthers more or less approximate in pairs ; their cells divaricate 



or divergent : filaments not exserted. Calyx equal at throat, 5-toothed ; the upper 

 tooth very much larger than the others. Corolla with dilated throat ; upper lip some- 

 what concave, emarginate or 2-lobed ; lower spreading, with middle lobe large. 



Tribe V. Stamens 4, ascending and parallel ; the anterior (lower or outer) pair longer 

 and with anthers mostly 1-celled by abortion ; those of the posterior pair 2-celled : 

 corolla bilabiate ; but with the small lateral lobes more connected with the galeate 

 upper lip ; lower lip therefore of a single lobe : calyx bilabiate ; its lips entire. 



SCUTELLARINE.(E. 



12. Scutellaria. Calyx gibbous, with a crest-like or hump-shaped projection on the 



back, closed after the corolla falls, not inflated. Corolla with long exserted tube. 

 Anthers ciliate-pilose. 



Tribe VI. Stamens 4 ; parallel and ascending under the concave and commonly galeate 

 upper lip of the bilabiate corolla ; the anterior (lower or outer) pair longer : anthers 

 2-celled or confluently somewhat 1-celled. Calyx 5 to 10-nerved, veiny. STACHYDE^:. 



13. Physostegia. Calyx nearly regular, and equally 5-toothed ; the tube campanulate 



or oblong, hardly nerved or veined, moderately inflated in fruit. Corolla gradually 

 inflated upward ; upper lip erect, rounded, entire ; lower somewhat spreading, 3- 

 parted, its roundish middle lobe emarginate. Filaments villous. Flowers simply 

 opposite in the spikes, one under each bract. 



14. Stacbys. Calyx tubular-campanulate or turbinate, 5 to 10-nerved, equally 5-toothed, 



sometimes the upper teeth larger. Corolla with cylindrical tube, not dilated at 

 throat ; upper lip erect, more or less concave, entire or emarginate ; lower spreading, 

 3-lobed. Stamens more or less deflexed to the sides of the throat or contorted after 

 anthesis : filaments naked : anthers approximate in pairs. 



