58. LABIATiE. 251 



9. Prunella. Two iuferior stam. longest. Filaments bifid, 

 one branch barren. Anth. all 2-celled. Cor. ringent ; upper 

 lip concave, entire. Cal. ultimately closed and compressed ; 

 upper lip flat, truncate, 3-toothed ; lower bifid. 



Tr. VI. NEPETE^. Stam. approaching, parallel under the 

 upper lip. of the cor., 2 inferior shortest. Cal. tubular. 



10. Nepeta. Anth. -cells diverging. Cor. ringent; upper 

 lip flat, straight, emarginate or bifid. Cal. 5-toothed. 



Tr. VII. STACHYDE^. Stam. approaching, parallel under 

 the upper lip of the cor., 2 inferior longest. Cal. tubular or 

 bellshaped, spreading in fruit. 



* Stamens exceeding the tube of the corolla. 



11. Melittis. Anth. approaching in pairs and forming a 

 cross, bursting longitudinally. Upper lip of the cor. flat, 

 entire, straight ; lower lip with 3 rounded nearly equal lobes. 

 Cal. membranous, bellshaped, ample, variously lobed. 



12. Lamium. Anth. approaching in pairs; cells diverging, 

 bursting longitudinally. Upper lip of the cor. arched ; late- 

 ral lobes of the lower lip minute toothlike or obsolete rarely 

 elongated. Cal. bellshaped, 6-toothed ; teeth nearly equal. 

 — Galeobdolon (Huds.) has the lobes of the lower hp of the 

 cor. nearly equal and acute. 



13. Lbonurus. Anth. approaching ; cells nearly parallel, 

 bursting longitudinally. Upper lip of cor. nearly flat, lower 

 with 3 obtuse lobes. Cal. tubular, 6-toothed, 2 lower teeth 

 rather the longest. Nuts flatly truncate. 



14. Galeopsis. Anth. approaching in pairs ; cells opposite, 

 bursting by 2 valves transversely. Upper lip of cor. arched, 

 lower lip 3-lobed with 2 teeth on its upper side, lobes un- 

 equal. Cal. tubular, 6-toothed; teeth equal or 2 upper 

 ones longest. Nuts rounded at the end. 



16. Stachys. Anth. approaching in pairs ; ceKs diverging, 

 bursting longitudinally. Upper lip of cor. concave, lower 

 of 3 unequal lobes. Cal. tubular-bellshaped with 5 equal 

 teeth. Nuts obtuse and convex at the end. 



16. Ballota. Anth. approaching in pairs ; cells diverging, 

 bursting longitudinally. Upper Hp of cor. erect, concave ; 

 lower 3-lobed, middle lobe cordate. Cal. funnel-shaped with 

 6 equal teeth. Nuts convex and rounded at the end. 



