CII. LABIAT/E (rAKEH). 



383 



as are the other parts of the plant, furnished with glandular dots. 

 Flowers verticillate, the two cymes which form the whorl usually con 

 gested into umbels; bracts minute or large and foliaceous; pedicels 

 often bracteolate. 



Species about 3000. Cosmopolitan. 



Tribe I. Oclxnoldeae. — Stamens decimate. 

 Calyx-tube not closely ribbed. 



Lower iip of tbe corolla small, and not very concave. 

 Corolla-tube short. Style bifid at the tip. 

 Upper tooth of the calyx decurrent. 



Upper tooth of calyx not wrapped round the 



others in fruit ... 

 Upper tooth of calyx wrapped round the others 

 in fruit ....... 



Upper tooth of calyx not decurrent. 

 Whorls of flowers separated. 

 Calyx with 2 entire lips 

 Calyx 5-toothed. 



Calyx accrescent ..... 



Calyx not accrescent .... 



Whorls congested into a dense capitnhnn 

 Corolla-tube long. Style not bifid .... 



Lower lip of the corolla large, concave. 

 Lower lip of corolla not abruptly deflexed. 

 Stamens 2. Fruit-calyx berry-like 

 Stamens 4. 



Filaments free to the base. 



Frnit-calyx, not circumscissile, very large, 

 accrescent ...... 



Fruit-calyx, not circumscissile, witli 5 large, 

 prickle-like teeth ..... 



Fruit-calyx circumscissile above the base. 

 Leaves alternate ..... 



Leaves opposite. ..... 



Calyx not circumscissile, 5-toothed; teeth sub- 

 equal or upper broader, not prickle-like 

 Filaments, united towards the base (see, t»o, 

 Plectranthiis insolitus). 

 Calyx with 2 oblong lips .... 



Calyx 5-toothed. 



Upper tooth ovate : 4 lower mucronate 

 Upper tooth large, ovate ; 4 lower small, 

 deltoid; calyx irregularly circumscissile 

 near the base ..... 



Teeth ovate, subequal .... 



Teeth all orbicular, very accrescent 

 Upper tooth large, concave, deflexed ; 4 lower 

 small ; calyx not circumscissile . 

 Lower lip of corolla abruptly deflexed 

 Calyx-tube with many close ribs ..... 



Tribe IT. Satureineae. — Stamens 4 in the Tropical 

 African genera, arcuate or divergent. CoroUa-lips 

 small, not very concave. Nucules with a small basal 

 areole. 



