cxii. LABIATE. (J. D. Hooker.) 605 



or 0, radicle inferior.^ Species about 2600, eMefly of north temperate 

 regions. 



Tribe 1. Oclmoldeae. Perfect stamens 4, rarely 2, declinate ; anther- 

 cells confluent. Ovary 4-partite. Nutlets d,tj, basal scar small. 



Subtribel. BuocimbjB. Upper oaZya;-foie usually broadest. Corolla -mtla. 

 4 of the lobes equal or the 2 upper connate, the lower (lip) dissimilar. 

 Stamens usually exserted. 



* Lower Up of corolla flat or nearly so. 



Fruiting calyx deflexed, upper tooth very large, deour- 

 rent, stigma 2-fld 1. OoiMUM. 



Fruiting calyx suberect or declinate, tube deeply pitted 2. Gbniospobum. 



Fruiting calyx decUnate, 2-lipped, upper filaments 

 toothed 3. Mbsona. 



Fruiting calyx declinate, 2-lipped; filaments simple, 

 included . . ., 4. PiATTSTOMA. 



Fruiting calyx suberect, 4 lower teeth cuneate j fila- 

 ments simple, included 5. Aceocephaius. 



Fruiting calyx usually declinate, equally 5-toothed, or 

 upper tooth broader j filaments included 6. MosoHOSMA. 



Fruiting calyx deflexed ; corolla-tube often long j stigma 

 entire : 7. Oethosiphon. 



** Lower lip of corolla concave or hoat-shaped. 



Calyx equally 5-toothed or 2-lipped j filaments free . . 8. PLEOTEAiTTHns. 



Stamens 4 ; filaments connate below 9. Coi<EUS. 



Calyx-mouth oblique, upper lip usually decurved ; fila- 

 ments free 10. Ahisoohilus. 



Corolla-lip deflexed, contracted at the base .... 10*. Hyptis. 



Subtribe 2. Lavandule^. Corolla 3-lipped ; upper lip 2-fid, lower 3-fid. 

 Stamens included. Nutlets with an oblique basal scar. 



11. Lavandttia. 



Tribe 2. Satureineae. Perfect stamens 4 with the upper pair longest, 

 or 2, straight diverging or ascending ; anthers (1- or) 2-oelled, cells short. 

 Corolla-lobes flat. 



Subtribe 1. PoGOSTEMONEiB. Stamens 4; filaments straight; anthers 

 1-celled. 



Calyx 5-toothed ; corolla 4-fid, lip spreading .... 12. Pooostemon. 

 Calyx 5-toothed; corolla Buhequally 4-fid; stamens 



exserted 13. Dtsophtlia. 



Calyx 5-partite, segments plumose ; stamens included . 14. Colebbookia. 



Subtribe 2. Menthoidejs. Stamens 4 or 2, distant, erect or spreading ; 

 anthers 2-celled (at least when young). 



* Whorls many-fld., spiked or racemed, not axillary. 



Fruiting calyx erect, elongate J stamens 4 15. Emholtzia. 



Fruiting calyx declinate, 2-lipped; stamens 4. ... 16. Peeilla. 

 Stamens 2 17. Mosla. 



** Whorls many-fld., axillary, rarely spicate ; calyx lQ-13-nerved. 



Calyx 10-nerved ; stamens 4, anther-eells parallel . . 18. Mentha. 

 Calyx 4-5-toothed stamens 2 ; nutlets truncate . . 19. Ltooptts. 



