520 LABIATAE 
3. Balm Tribe 
Corolla clearly 2-lipped; upper lip plane or only slightly concave. 
Stamens 4, diverging at base, converging above, the anterior - 
(lower) pair longest. 
Calyx with 5 equal teeth, bell-shaped, naked at the throat, 
10-nerved; corolla tube straight .. . . SATUREIA 
Calyx tubular (not bell-shaped), 2-lipped, mostly, 13- nerved; corolla 
tube much longer than calyx, naked or hairy at throat; anther 
sacs divergent . . . . . . CLUNOPODIUM 
Calyx somewhat ‘bell-shaped, 2. Saree A ie curved. Stamens 
scarcely extending beyond tube. Anther sacs divergent . . MELISSA 
4. The Sage Tribe 
Corolla clearly 2-lipped; fertile stamens 2 only, the other pair when 
existent reduced to rudimentary organs. 
The two sacs of the anthers divergent. 
Between the two sacs of the anther is a bridge of connec- 
tion as broad as the anther sac. At one extremity is a 
fertile sac, at the other a sterile one . . .  . SALVIA 
The connection between the two anther sacs is not broad or 
well developed, the two sacs coalescing at their extremities. 
Superior lip of the corolla erect or arched, Calyx tubular, 
15-nerved, the teeth equal . . . . Monarpa 
Calyx 13-nerved, the teeth unequal. Throat of ‘corolla tube 
not hairy, the two stamens extending ics the upper 
pen eee . . . BLEPHILIA 
Stamens not extending beyond the: upper ‘lip. Throat of 
corolla hairy . . HEDEOMA 
The two anther sacs parallel; calyz equally 5- toothed, corolla 
tube hairy. <2.) «) bs 00 6) Bee ee i ee 
5. The Hedge-Nettle Tribe 
Corolla plainly 2-lipped; the upper lip concave. Stamens 4; the 
anterior (lower) pair longest. Stamens approaching above under 
the upper lip of the corolla. 
Calyx not distinctly si alia teeth 3 to 10. 
Calyx nearly equally 5-toothed, the teeth membraneous; anther 
cells parallel to the filaments . . . . . . PHYSOSTEGIA 
Anterior branch of the style longer than the posterior . PHLOMIS 
Branches of the style nearly equal. 
Anthers with 2 equal sacs which are divergent. 
Teeth of the calyx spiny . . . . . . . LEONURUS 
Teeth of the calyx not spiny . . . LamMium 
Anthers with divergent sacs each of which | is transversely 
OVAIVER I 7a) 2 . » « GALEOPSIS 
Anther saes divergent, but not, transversely. 2- valved. 
Calyx funnel-form, the 5 teeth spreading into a fringe; 
anther sacs divergent. . .. 8) 4 “BALEOTE 
Corolla tube not longer than the calyx, annthient sacs di- 
vergent; filaments lean outward . . . . . . STAcHYS 
