314 LABIATE. 



slender, stigma simple or 2-fid ; ovules solitary in each cell, erect, anatro- 

 pous. Fruit of 1-4 1-seeded nutlets. Seed erect or ascending, testa 

 thin, albumen ; embryo straight, rarely curved, cotyledons fleshy, radicle 

 next the hilum. — Disteib. All warm and temp, regions, rare in Arctic 

 and alpine ; geuera 136 ; species about 2,600. — Affinities. With Bora- 

 ginece and Verbenacece. — Properties. Stimulant, fragrant, aromatic. 



Tribe I. SATUREINE'JE, Corolla-lobes flat or margins recurved. Stamens 

 2-4, remote, spreading or conniving under the upper lip, 2 upper shorter 

 or 0; anther-cells contiguous or confluent. Nutlets free, smooth, or 

 nearly so. 



* Corolla subregular. Stamens spreading ; anthers 2-celled. 



Perfect stamens 4 1. Mentha. 



Perfect stamens 2 2. Lycopus. 



** Corolla 2-lipped. Stamens 4, distant. 



Erect, leaves broad. Calyx equally 5-toothed 3. Origanum. 



Procumbent, leaves small. Calyx 2-lipped 4. Thymus. 



*** Corolla 2-lipped. Stamens 4, conniving under the upper lip. 



Corolla-tube straight; upper lip flat 5. Calamintha. 



Corolla-tube curved, ascending; upper lip concave 5*. Melissa. 



Tribe II. MONARDE'iE. Stamens 2, erect or ascending; antbers 1-celled, 

 or if 2-celled cells remote. Nutlets free, smooth, or nearly so. 

 Calyx 2-lipped 6. Salvia. 



Tribe III. NEPETE'iE. Stamens 4, 2 upper longer, ascending or diverging ; 

 anther-cells 2, parallel or nearly so. Nutlets smooth or tubercled. 

 Upper lip of corolla truncate 7. Nepeta. 



Tribe IV. STACHYDE'iE. Stamens 4, parallel, 2 upper shorter, ascend- 

 ing under the concave upper lip or included in the tube. Nutlets free, 

 smooth or tubercled. 



* Calyx 2-lipped, not inflated, lips closing over the fruit. 



Filaments 2-fid, anthers all 2-celled 8. Brunella. 



Filaments simple, 2 lower anthers 1-celled 9. Scutellaria. 



**Calyx inflated or 2-lipped. Anthers exserted 10. Melittis. 



***Calyx tubular. Anthers included 11. Marrubium. 



**** Calyx 5-toothed, subcampanulate, equal or oblique. 



Calyx 5-toothed. Anthers glabrous. Nutlets obtuse 12. Stachys. 



Calyx-teeth 5, spinous. Anthers ciliate. Nutlets compressed ..13. Galeopsis. 

 Calyx-teeth 5, spinous. Anthers glabrous. Nutlets 3-quetrous, truncate. 



13*. Leonurus. 

 Calyx 5-nerved. Anthers hairy. Nutlets 3-quetrous, truncate... 14. Lamium. 

 Calyx-limb spreading; teeth broad. Anthers glabrous. Nutlets obtuse. 



15. Ballota. 



