

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. 

 fc J^Corolla very irregular : limb nearly 1-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. 



Stamens only slightly exserted, nearly equal. 

 Stamens conspicuously exserted, strongly didynamous. 



Ovary of 4 distinct or nearly distinct carpels : style basal : nutlets basally attached. 

 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. 

 Anther-sacs parallel or nearly so. 



Upper pair of stamens declined, lower pair ascending: erect 



herbs. 



Upper and lower pair of stamens ascending : trailing herbs. 

 Anther-sacs diverging. 



Calyx barely 2-lipped, with 5 nearly equal lobes : erect herbs. 

 Calyx 2-lipped, with unequal lobes: trailing herbs, 

 pair of filaments shorter than the lower. 

 Jyx 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 : 



calyx dorsally flattened. 

 Anther-sacs parallel : flowers solitary, or 2 in a whorl : 



calyx somewhat inflated. 

 Upper lip of the calyx narrow, entire, the lower lip of 2 equal 



broad lobes. 



Calyx not 2-lipped, often slightly irregular, but the lobes essen- 

 tially similar. 



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-sacs transversely 2-valved. 

 Anther-sacs not transversely 2-valved. 

 Nutlets 3-sided, truncate above. 

 Calyx-lobes not spine-tipped. 

 Calyx-lobes spine-tipped. 

 Calyx-lobes 5*. 

 Calyx-lobes 8-10. 



Nutlets nearly terete, rounded above. 

 Anther-bearing stamens 2. 

 ..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 $ot 2-lipped ; tube 15-ribbed ; teeth nearly equal. 

 Calyx 2-lipped ; 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. 



f Filaments curved, converging under the upper lip of the 



corolla. 

 Anther-bearing stamens 2. 



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. 



1. TEUCKIUM. 



2. MELOSMON. 



3. ISANTHUS. 



4. TRICHOSTEMA. 



5. SCUTELLARIA. 



6. MARRUBIUM. 



7. AGASTACHE. 



8. MEEHANIA. 



9. NEPETA. 

 10. GLECOMA. 



11. PRUNELLA. 



12. BRAZORIA. 



13. MACBRIDEA. 



14. PHYSOSTEGIA. 



15. SYNANDRA. 



16. GALEOPSIS. 



17. LAMIUM. 



18. LEONURUS. 



19. LEONOTIS. 



20. STACK vs. 



21. SALVIA. 



22. SALVIASTRUM. 



23. MONARDA. 



24. BLEPHILIA. 



25. HEDEOMA. 



26. STACHYDEOMA. 



27. MELISSA. 



28. CONRADINA. 



