LAMIACEAE. 295 



Calyx 2-lipped ; both lips entire ; stamens 4. 3. Scutellaria. 



Calyx either 2-lipped and at least one of the lips toothed, or regularly 4-5 

 toothed. 

 Stamens included in the corolla-tube. 4. Marrubium. 



Stamens exserted. 



Upper lip of the corolla concave. 

 Anther-bearing stamens 4. 



Upper stamens longer than the lower. 

 Calyx 5-toothed. 



Anther-sacs parallel or nearly so ; stamens divergent. 



5. Agastache. 

 Anther-cells divaricate ; anther approximate in pairs. 

 Calyx regularly 5-toothed ; plants erect. 6. Nepeta. 

 Calyx irregularly s-toothed ; plant trailing. 



7. Glecoma. 

 Calyx distinctly 2-lipped. 8. Dracocephalum. 



Upper stamens shorter than the lower. 



Calyx distinctly 2-lipped, closed in fruit. 9. Prunella. 



Calyx 5-toothed, not 2-lipped, open in fruit. 



Calyx membranous, inflated in fruit, faintly nerved. 



10. Physostegia. 

 Calyx not membranous, not inflated in fruit, strongly 5-10- 

 nerved. 

 Nutlets 3-sided, truncate above. 11. Leonurus. 



Nutlets ovoid, nearly terete, rounded above. 



12. Stack Ys. 

 Anther-bearing stamens 2. 



Connective of the anthers very long, articulated to the filaments, 

 bearing a perfect anther at the ascending end and a reduced one 

 or none at the other; calyx 2-lipped. 13. Salvia. 



Connective of the anther short ; anther-cells confluent ; calyx equally 

 5-toothed. 14. Monarda. 



Upper lip of the corolla flat. 



Stamens curved, often converging. 



Calyx regularly 5-toothed ; anther-bearing stamens 2. 



15. Poliomintha. 

 Calyx 2-lipped or irregularly 5-toothed. 



Anther-bearing stamens 2. 16. Hedeoma. 



Anther-bearing stamens 4. 17. Clinopodium. 



Stamens straight, distant and diverging ; calyx almost regularly 5- 

 toothed ; anther-bearing stamens 4. 18. Madronella. 



Corolla nearly regular, 4-s-toothed. 



Anther-bearing stamens 2. 19. Lycopus. 



Anther-bearing stamens 4. 20. Mentha. 



I. TEUCRIUM L. Germander. 



I. Teucrium occidentale A. Gray. In thickets and among bushes in rich 

 soil from Ont. and B. C. to Pa., Colo, and Calif. — Alt. 4000-6000 ft. — New 

 Windsor, Weld Co. ; Caiion City ; Ft. Collins ; Rocky Ford ; Boulder. 



2. MELOSMON Raf. 



I. Melosmon laciniatum (Torr.) Small. (Teucrium laciniatum Torr.) 

 On plains from Kans. and Colo, to Tex. and Ariz. — St. Charles River, 

 Pueblo Co. ; Walsenburg ; Apishapa Creek, Otero Co. ; Caiion City ; Trini- 

 dad ; Cedar Hills. 



