244 MINT FAMILY. 



5. COLEUS. Calyx as in Xo. 4. Corolla similar, but the lower lobe longer and 



concave or boat-shaped, enclosing the stamens and style: filaments monadel- 

 phouft. 



6. HYPTIS. Calyx with 5 less unequal or equal teeth. Corolla of 4 short simi- 



lar upper lobes, and a longer abruptly deflexed saccate lower one; filaments 

 separate. 



7. LAV AXDL'LA. Calyx not deflexed, 13-15-nervcd. 5-toothed, the upper tooth 



mostly larger. Corolla with tube longer than the calyx, regularly 2-lipped, 

 i. e. upper lip 2-lobed, lower 3-lobed, the lobes all equally spreading. Sta- 

 mens included, but declined towards the lower lobe of the' corolla. 



3. Stamens 4 (and the lower or outer pair longest) or 2, strait/lit and distant or 

 dii'eryiny : anthers ]>lainly '-< tiled, not conniriiif/ in p lirs. Lobes of the 

 corolla lint and spreading, ur lite upper emt but not an lied. 



* Corolla short and rather bell-shaped, hardly if at ail 2-lipped, the 4 or rarely 5 



lobes nearly eyual ami all spreading. 

 3. PERILLA. Calyx in flower 5-clcft, in fruit nodding and enlarging, becoming 



2-lipped. Corolla 5-cleft, the lower lobe u little longer. Stamens 4, nearly 



equal. Style deeply 2-c-left. 

 9. MKXTHA. Calyx equally fr-toothed. Corolla with a 4-cleft border, the upper 



lobe a little broader and sometimes notched at the end. Stamens 4, nearly 



equal, similar. 



10. LYCOPUS. Calyx 4 -5-toothed. Corolla Avith 4 about equal lobes. Stamens 



2: the upper pair, if any, without anthers. 



* * Corolla evidently 2-lipped, but all tit e lobes of nearly erpi'tl li-nytli, the upper lip 



erect and month/ untthtd. lite toirer spreading and 3-cleft, the lobe not bearded 

 within : stamens with anthers only 2. 



11. CUNILA. Calyx equally 5-toothed, striate, very hairy in the throat, one half 



shorter than the corolla*. Stamens 2, long and protruding: no rudiments of 

 the other pair. 



12. HKDKOMA. Calyx 2-lipped, gibbous on the lower side near the base, hairy 



in the throat. Corolla short. Stamens 2, with anthers scarcely protruded, 

 and 2 sterile short filaments tipped with a little head in place of anther. 



* # # Corolla eloni/ated and irregular: the lower lobe or Up much the larger, pen- 



dent, cut-toothed or fringed, the 4 others nearly egnal and alike,: tube icith a 

 bearded riny inside at the bottom of Hie enlarged throat : stamens 2 with 

 anthers or rarely 4. 



13. COLLINS05JIA. Calyx ovate, enlarging and turned down after flowering, 



2-lipped, the upper lip flat and 3-toothed, the lower 2-cleft. Cells of the an- 

 ther diverging. 



* # # # Corolla evidently 2 lipped, short, the tipper lip erect or somewhat spread- 



ing and nearly entire or noUhcd, the lower spreading or 3-cleJ't,: stamens with 

 anthers 4. 



14. HYSSOPUS. Calyx tubular, 15-nerved, equally 5-toothed, naked in the throat. 



Corolla with the' middle lobe of the lower ifp larger and 2-cleft. Stamens 

 very long and protruding. 



15. PYCNANTHEMUM. Calyx oblong or short-tubular, about 13-nerved, equally 



5-toothed or somewhat 2-lipped, naked in the throat. Corolla with the lobes 

 of the lower lip ovate and entire. Flowers crowded in heads or close cyme-*. 



16. OR1GANTM. Calyx hairy in the throat, about 13-nerved. Lower lip of the 



corolla of 3 similar lobes. Flowers crowded into spike-like clusters and fur- 

 nished with imbricated often colored brstcts. 



17. THYMUS. Calyx ovate, hairy in the throat, 13-nerved, 2-lipped; the upper 



lip 3-toothed and spreading, the lower cleft into 2 awl-shaped ciliate lobes. 

 Corolla not strongly 2-lippcd, the upper lip resembling the 3 lobes of the lower 

 lip but notched at the apex. Stamens mostly protruding. 



18. SATUBElA. Calyx bell-shaped, naked in' the throat, 10-nerved, equally 



5-toothed. Corolla with lower lip of 3 nearly equal entire lobes. Stamens 

 somewhat ascending. Leaves narrow. 



^ 4. Stamens 4 (the, lower or outer pair longer), ascending or curved and ivith the 

 plainly 2-<-elled anthers approximate or conniving in pairs under the erect and 

 Jlattish but not arched upper lip. Calyx more or less Z-lipped. 



19. CALAMINTHA. Calyx not flattened. Corolla straight, with inflated throat, 



and 2-lipped border,' the spreading lower lip 3-parted, its middle lobe entire 

 or slightly notched. 



