>f 



LABIATE. 641 



r Anthers opening by transverse valves, one valve fringed with small hairs. 



5<{ 13. GrALEOPSIS. 



LAnthers opening by longitudinal valves 6 



fi f Flowers bright yellow Yellow Lamium. 



I Flowers purple, pink, or white 7 



f Nuts flat and angular at the top. Lateral lobes of the lower lip of the 

 corolla either very small and tooth-like or pointed. Anthers hairy. 

 7 <{ 16. Lamium. 



J Nuts rounded at the top. Lateral lobes of the lower lip usually obtuse. 



L Anthers glabrous 8 



"Calyx funnel-shaped, the teeth ovate, spreading, with a fine point. 



14. Ballota. 



L Calyx tubular or campanulate, with narrow-pointed teeth 12. Stachys. 



{Calyx of 2 entire lobes, the upper one with a concave scale on the back. 

 9. Skullcap. 

 Calyx with the upper lip more or less toothed or lobed, the lower one 2- 

 cleft to the base 10 



r Stamens 2 (the filaments branched, one branch with a perfect anther-cell, 



10 s the other with an imperfect one) 1. Sage. 



I Stamens 4, each with a 2-celled anther 11 



f Calyx broadly campanulate, veined, with 4 or 5 obtuse lobes or teeth. 



10. Melittis. 

 J Calyx upper-lip fiat and angular, with 3 small teeth. Filaments with a 



small tooth below the anther 8. Prunella. 



Calyx upper-lip 3 -toothed, the tube 13--nerved, hairy inside at the top. 

 ^ 6. Calamint. 



r Lobes of the corolla nearly equal 13 



12 < Upper lobes of the corolla very short and tooth-like, lower ones elongated 



I so as to make the corolla appear 1 -lipped 17 



ls f Stamens 2 2. Lycopus. 



I Stamens 4 14 



(Corolla nearly regular, 4-lobed. Calyx equally 5-toothed, scarcely hairy 

 in the throat . . 3. Mint. 



LUpper lip of the corolla erect. Calyx very hairy in the throat . . .15 

 /-Low, procumbent plant, with small leaves. Calyx distinctly 2-lipped. 

 i 4. Thyme. 

 1 Erect plant. Flowers in heads, intermixed with bracts in a terminal 

 L panicle. Calyx nearly equally 5-toothed .... 5. Marjoram. 

 - fi J Calyx with 10 recurved teeth. Stamens all perfect . . 11. Horehound. 

 1 Calyx with 5 teeth. Stamens mostly barren 14 



{Short upper lip of the corolla deeply cleft into 2 teeth, between which the 

 stamens protrude 17. Germander. 

 Short tooth-like upper lip entire or notched, behind the stamens. 

 18. Bugle. 



The genera of Labiates have been distributed into eight Tribes, of 

 which the five following are represented in Britain : — 



TOL. II. M 



