33] 
** Limb ofcorolla irregular, seemingly unilabiate, the upper lip being split down: 
stamens exserted from the cleft. 
4, Teucrium. Corolla deeply cleft between the 2 small lobes of the upper lip. 
II. Nutlets smooth or granulate: ovary deeply 4-parted. 
Tribe II. Stamens declined toward or resting on lower lip of corolia, didynamous, 
all fertile: lower lip of corolla apparently formed of anterior lobe only. 
5. Hyptis. Corolla with lower lobe saccate, abruptly deflexed at contracted and 
callous base. 
Tribe III. Stamens not declined, upper pair shorter or wanting ; anthers 2-celled: 
upper lip of corolla not galeate or concave: flowers in more or less crowded clusters 
or whorls, axillary or spicate. 
* Corolla not evidently 2-lipped, but almost equally 4-lobed, small: stamens erect 
distant. 
6. Mentha. Fertile stamens 4, nearly equal. 
7. Lycopus. Fertile stamens 2, and often 2 sterile filaments without anthers. 
* * Corolla more or less 2-lipped. 
+ Stamens distant and straight, often divergent, never convergent or curved. 
8. Pycnanthemum,. Calyx ovate or short-tubular, 10 to 13-nerved, hairy in the 
throat: stamens 4: flowers in dense heads or clusters. 
+ + St«mens ascending or arcuate, often more or less converging and sometimes 
ascending parallel under the erect upper lip of the corolla: calyx 12 to 15-nerved. 
++ Stamens 4, all antheriferous. 
9. Micromeria. Calyx not gibbous, about equally 5-toothed: stamens arcuate, 
shorter than corolla. 
10. Calamintha. Calyx often gibbous, 2-lipped: stamens ascending parallel under 
or beyond the upper lip, or conniving in pairs. 
++ + Antheriferous stamens 2, 
11. Poliomintha. Calyx terete and regular, equally 5-toothed or nearly so: 
corolla mostly with a hairy ring within the throat or tube: fruticulose. 
12. Hedeoma. Calyx usually gibbous, more or less 2-lipped or unequally 5-toothed: 
tube of corolla naked: low herbs. 
Tribe IV. Stamens 2, ascending and parallel; anthers apparently or really 1-celled: 
corolla strongly 2-lipped. 
13. Salvia. Calyx 2-lipped: anthers with a long connective astride the fila- 
ment, bearing a linear cell at the upper end, and none or an imperfect cell on the 
lower. 
14. Monarda. Calyx tubular and elongated, equally 5-toothed: anthers of 2 cells 
confluent into one, the connective inconspicuous. 
15. Blephilia. Calyx ovate-tubular, 2-lipped: anthers as in the last. 
Tribe V. Stamens 4, the inner pair longer than outer, ascending or diverging: 
corolla 2-lipped, the upper lip concave or arched, the lower spreading: calyx mostly 
15-nerved. 
16. Lophanthus. Stamens divergent, exserted; upper pair declined, lower 
ascending. 
17. Cedronella. Stamens all ascending, not exceeding the lip of the corolla, 
Tribe VI. Stamens 4, ascending and parallel: calyx 2-lipped, closed in fruit, the 
rounded lips entire: corolla 2-lipped, the upper lip arched. 
18. Scutellaria. Calyx with a helmet-like projection on the upper side, not 
inflated. 
19. Salizaria. Calyx globular, not appendaged or gibbous on the back, becoming 
inflated or reticulated. 
