380 LABIATE 



Several species of Sage {Salvia) are also cultivated for the sake of 

 their brilliantly coloured blossoms. 



■^ Stamens 4, distant, the two upper shorter ; nutlets free^ smooth or 



nearly so 



t Corolla subregular ; stamens spreading 



1. Mentha. — ^All four stamens perfect. 



2. Lycopus. — Two upper stamens aborted. 



ft Corolla 2 -lipped 



3. Origanum. — Calyx with 5 equal teeth ; stamens diverging. 



4. Thymus. — Prostrate ; leaves amall ; calyx 2-lipped ; stamens 

 diverging. 



5. Clinopodium. — Corolla-tube straight ; stamens converging at 

 their tips. 



■^6. Mel/ssa. — Corolla-tube curved ; stamens converging at 

 their tips. 



** Stamens 2 ; anthers distractile ; nutlets jree, smooth or 

 nearly so 



7. Salvia. — Calyx and corolla both 2-lipped. 



^** Stamens 4, the two upper longer ; nutlets free, smooth 



8. Nepeta. — Calyx with 5 nearly equal teeth; corolla with flat 

 upper lip. 



•x-if-if-jf Stamens 4, parallel, the 2 tipper shorter ; nutlets jree 



t Calyx 2-lipped 



9. Scutellaria. — Calyx closing over the fruit ; 2 lower anthers 

 I -chambered. 



10. Prunella.— CaZyx closing over the fruit; anthers all 

 2-chambered ; filaments forked. 



ir. Melittis. — Ca/yx inflated ; anthers exserted. 



ft Calyx with 5 — 10 equal or sub-equal teeth 



12. Marrubium. — Ca/yx tubular, I o-toothed ; anthers incXudQd. 



13. Stachys. — Calyx sub-campanulate, with 5 equal teeth; 

 anthers smooth, bursting lengthwise. 



14. Galeopsis. — Calyx sub-campanulate, with 5 prickly teeth; 

 anthers fringed, bursting transversely. 



^15. Leonurus. — C^Zyx sub-campanulate, with 5 prickly teeth; 

 anthers smooth, warty, bursting lengthwise. 



16. Lamium. — Calyx sub-campanulate, 5-toothed ; anthers hairy, 

 bursting lengthwise. 



