The Flora of the Cayuga Lake Basin 355 



a. Corolla 2-lipped or nearly regular. 



b. Stamens long-exserted, approximate, and strongly upcurved ; nutlets reticulate. 



2. Trichostema 

 b. Stamens not as above; nutlets smooth or granulate. 



c. Calyx with a crest or callosity on the upper side. 3. Scutellaria 



c. Calyx without a crest or callosity. 

 d. Stamens and style included in the tube of the corolla ; calyx teeth aristate, 



recurved. A. Marrubium 



d. Stamens and style exserted beyond the corolla tube ; calyx teeth not re- 

 curved. 

 e. Corolla strongly 2-lipped ; upper lip convex and usually arched as seen 

 from the side (or only slightly so in no. 5), sometimes with revolute 

 margins. 

 /. Stamens with anthers 4. 



g. Upper pair of stamens longer than the lower pair. 



h. Anthers not approximate in pairs, plainly exserted, the upper ones 



declined; calyx nearly regular. 5. Agastache 



h. Anthers approximate in pairs, scarcely extending beyond the upper 

 . lip. 



t. Calyx nearly regular; bracts small. 6. Nepeta 



i. Calyx 2-lipped; bracts large, pectinate. [Dracocephalum] 



g. Upper pair of stamens shorter than the lower pair. 



h. Calyx closed in fruit; bracts large, broad, and reniform. 



7. Prunella 

 h. Calyx open in fruit; bracts not as above. 



i. Calyx inflated in fruit and obscurely nerved ; the long tube of 



the corolla gradually dilated. 8. Physostegia 



». Calyx not inflated, firmer, and strongly nerved; corolla tube 

 abruptly or scarcely dilated. 

 j. Calyx teeth rigid and spine-tipped. 



k. Leaves pinnately crenate; anthers transversely 2-lipped, the 



smaller lip ciliate. 9. Galeopsis 



k. Leaves palmately incised or lobed ; anthers normal. 



10. Leonurus 

 /. Calyx teeth not spine-tipped. 



k. Nutlets sharply 3-angled, truncate at apex ; lower lip of 



corolla sharply constricted at base. 11. Lamium 

 k. Nutlets obscurely angled, rounded at apex ; lower lip of 

 corolla not much constricted; (stamens often deflexed 

 after flowering). 12. Stachys 



/. Stamens with anthers 2. 

 g. Calyx 2-lipped. 

 h. Anthers with very much elongated connectives, unequally versatile, 



one anther cell usually abortive. [Salvia] 



h. Anthers normal. 13. Blephilia 



g. Calyx regular. 14. Monarda 



e. Corolla slightly 2-lipped or almost regular; upper lip nearly flat, erect 

 or spreading and not arched. 

 /. Flowers in more or less crowded clusters or whorls, or axillary. 

 g. Corolla more or less 2-lipped; upper lip erect or spreading, lower 

 lip also spreading. 

 h. Fertile stamens 2. 15. Hedeoma 



h. Fertile stamens 4. 

 i, Stamens curved, often converging under the upper lip of the 

 corolla. 



