LAMIACEAE. 



245 



cm. long: calyx 3-5 mm. long, accrescent; tube ribbed, little longer than the 

 slender upper lobes during anthesis: corolla white and magenta-tinged, about 

 8 mm. long: achenes 4-5 mm. long. Common, in woods and thickets. 

 Sum. LOPSEED. 



FAMILY 9. LAMIACEAE. MINT FAMILY. 



Herbs or woody plants, often aromatic. Stems 4-sided. Leaves op- 

 posite or whorled: blades simple, entire, toothed, or lobed. Flowers per- 

 fect, in open or compact cymes. Calyx of 5 partly united sepals, regular 

 or 2-lipped. Corolla of 5 partly united petals, 2-lipped or nearly regular. 

 Androecium of 2 or 4 stamens, the pairs often unequal. Gynoecium 2- 

 carpellary. Ovary 4-celled. Fruit of 4 nutlets included in the calyx. 



Ovary of 2 united carpels, 4-lobed : style not basal : nutlets laterally attached. 

 Corolla very irregular ; limb nearly 1-lipped, the upper lip very short. 



1. TEUCRIUM. 

 Corolla nearly regular or slightly 2-lipped, the lobes 



nearly equal. 

 Calyx nearly regular : stamens only slightly exserted, 



nearly equal. 



Calyx decidedly 2-lipped : stamens conspicuously ex- 

 serted, didynamous. 

 Ovary of 4 distinct or nearly distinct carpellary lobes : style 



basal : nutlets basally attached. 

 Calyx with a crest on the upper side or on the upper lip : 



lips 2, entire. 



Calyx without a crest on the upper side : lips not entire. 

 Stamens included. 



Anther-sacs divergent. 

 Anther-sacs contiguous and confluent. 

 Stamens exserted. 



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. 

 Anther-sacs diverging. 



Calyx barely 2-lipped, with 5 nearly 



equal lobes : erect herbs. 

 Calyx 2-lipped, with unequal lobes : 



trailing herbs. 

 Upper pair of filaments shorter than the 



lower. 



Calyx manifestly 2-lipped. 

 Calyx merely with 3-10 lobes. 



Tube of the calyx faintly nerved, 



inflated at maturity. 

 Tube of the calyx prominently 5-10- 

 nerved, not inflated at maturity. 

 Nutlets 3-sided, truncate above. 

 Calyx-lobes not spine-tipped. 

 Calyx-lobes spine-tipped. 

 Nutlets nearly terete, rounded 



above. 

 Anther-bearing stamens 2. 



Connective of the anther elongate, bearing a 

 perfect sac at one end and a rudimen- 

 tary one at the other. 

 Connective short : anther-sacs confluent. 

 Corolla regular, or if 2-lipped, the upper lip flat 



or not concave. 



Flowers in axillary whorls or clusters ; these 

 sometimes forming terminal spike-like ra- 

 cemes or panicles. 

 Corolla 2-lipped." 



Filaments curved, converging under the 



upper lip of the corolla. 

 Anther-bearing stamens 2. 

 Anther-bearing stamens 4. 

 Corolla-tube strongly bent. 



2. ISANTHDS. 



3. TBICHOSTEMA. 



4. SCUTELLARIA. 



5. SlDERITIS. 



6. MABKUBIDM. 



7. AGASTACHE. 



8. NEPETA. 



9. GLECOMA. 



10. PBUNELLA. 



11. DRACOCEPHALUM. 



12. LAMIUM. 



13. LEONUBUS. 



14. STACHYS. 



15. SALVIA. 



16. MONABDA. 



17. HEDEOMA. 



18. MELISSA. 



