LAMIACEAE 1017 
or nearly regular. Calyx free, persistent, regular or irregular, often oblique : 
lobes 5, commonly slender. Corolla gamopetalous, bilabiate, or nearly regular, 
deciduous. Androecium of 4 didynamous stamens (one of the pairs sometimes 
wanting or abortive) adnate to the corolla tube, variable in position. Filaments 
naked or bearded. Anthers 2-celled. Gynoecium compound. Ovary free, 
deeply 4-lobed, 4-celled. Styles central, united, arising from between the lobes. 
Stigma terminal, often inconspicuous. Ovules solitary, erect. Fruit usually of 
4 small nutlets or achenes, included in the persistent calyx. Seed solitary, erect. 
Endosperm fleshy or wanting. Embryo straight. [Labiatae B. Juss.] 
Ovary of 4 united carpels, 4-lobed : style not basal: nutlets laterally attached. 
Corolla very irregular: limb nearly I-lipped, the upper lip very short. 
Flowers in congested cymes axillary to small bracts, disposed in a raceme- 
like panicle: calyx-lobes shorter than the tube. 
Flowers solitary in the axils of bracts nearly similar to the leaves: calyx- 
lobes longer than the tube. 
Corolla nearly regular. 
. TEUCRIUM. 
. MELOSMON. 
Stamens only slightly exserted, nearly equal. 3. ISANTHUS, 
Stamens conspicuously exserted, strongly didynamous. 4. TRICHOSTEMA. 
Ovary of 4 distinct or nearly distinct carpels : style basal: nutlets basally attached. 
5. SCUTELLARIA. 
Calyx with a crest on the upper side or upper lip ; lips 2, entire. 
Calyx without a crest on the upper side: lips not entire. 
Stamens included. 
Stamens exserted (except in Dicerandra odoratissima). 
Corolla conspicuously 2-lipped : lips different, the upper concave. 
Anther-bearing stamens 4. 
Upper pair of filaments longer than the lower. 
e 
. MARRUBIUM. 
Anther-saes parallel or nearly so.  . 
Upper pairof stamens declined, lower pair ascending: erect 
erbs. ‘ 7. AGASTACHE. 
Upper and lower pair of stamens ascending : trailing herbs. 8. MEEHANIA. 
Anther-sacs diverging. 
Calyx barely 2-lipped, with 5 nearly equal lobes: erect herbs. 9. NEPETA. 
Calyx 2-lipped, with unequal lobes: trailing herbs. 10. GLECOMA. 
Upper pair of filaments shorter than the lower. 
Calyx manifestly 2-lipped. 
Upper lip of the calyx broad, with 3 lobes, the lower with 2 
tooth-like lobes. 
Anther-sacs divaricate : flowers 3 together, or 6 in a whorl: 
11. PRUNELLA. 
calyx dorsally flattened. 
Anther-saes parallel: flowers solitary, or 2 in à whorl: 
calyx somewhat inflated. 
Upper lipof the calyx narrow, entire, the lower lipof 2 equal 
broad lobes. 
Calyx not 2-lipped, often slightly irregular, but the lobes essen- 
tially similar. b 
Tube of the calyx faintly nerved, inflated at maturity. 
Calyx-lobes 5. 
Calyx-lobes 4. 
Tube of the calyx prominently 5-10-nerved, not inflated at 
maturity. 
Anther-saes transversely 2-valved. 
Anther-saes not transversely 2-valved. 
Nutlets 3-sided, truncate above. 
Calyx-lobes not spine-tipped. 
Calyx-lobes ae docet. 
Calyx-lobes 5. 
Calyx-lobes 8-10, 
Nutlets nearly terete, rounded above. 
Anther-bearing stamens 2. 1 
Connective of the anther elongated, bearing a perfect sac at one end 
and a rudimentary one at the other. 
Calyx-throat glabrous or merely ciliate at the base of the lobes. 
Calyx-throat densely bearded with white hairs and closed by 
them at maturity. 
Connective short: anther-sacs confluent. 
Calyx not Lt te ; tube 15-ribbed ; teeth nearly equal. 
Calyx 2-lip ; tube 13-ribbed ; teeth unequal. 
Corolla nearly regular or if 2-lipped, the upper lip flat or not concave. 
A. Stamens 2-4: filaments straight and spreading or converging under 
the upper lip of the corolla. : : 
Flowers in axillary whorls or clusters; these sometimes forming 
terminal spike-like racemes or panicles. 
* Corolla 2-lipped. : 
1 Ea nenie curved, converging under the upper lip of the 
corolla. 
Aahe berag stamens 2. 7 : 
Calyx gibbous; throat closed by hairs : corolla without 
folds in the throat. ; 
Calyx not gibbous ; throat not closed by hairs: corolla 
with 2 folds in the throat. 
Anther-bearing stamens 4. 
Corolla-tube strongly bent. 
Anther-sacs divergent. 
Anther-sacs parallel. 
Corolla-tube straight. : 
Calyx with 5 nearly equal lobes, not 2-lipped. 
. BRAZORIA. 
. MACBRIDEA. 
. PHYSOSTEGIA. 
5. SYNANDRA. 
. GALEOPSIS. 
. LAMIUM. 
. LEONURUS. 
. LEONOTIS. 
. STACHYS. 
. SALVIA. 
. SALVIASTRUM. 
. MONARDA. 
. BLEPHILIA. 
. HEDEOMA. 
. STACHYDEOMA. 
. MELISSA. 
. CONRADINA. 
