Leucas.] 



CII. LABIATE (baker). 



478 



with a very short upper lobe. Nucules ovoid-triquetrous. — Annual or 

 perennial herbs or undershrubs. Leaves entire or toothed ; upper tioral 

 leaves like the others or reduced. Whorls few or many-flowered, usually 

 remote. Corolla pallid ; upper lip densely clothed with white hairs. 



Species about 100, spread tlirongh the tropical regions of the Old World, one also 

 American. 



=L0X0ST0MA, Benth. Throat of calyx-tube oblique, 

 produced on the lower side, 

 •j* Bracts obsolete. 



Annual 21. i. ehracteata. 



Perennial ........ 22. L. Holstii. 



ffBracts minute. 



§ Leaves sessile or subsessile. 



Leaves oblong-lanceolate 23. Z. neuflizeana. 



Leaves oblong 24. L. Schweinfurthii. 



Leaves ovate. 



Calvx ^ in. long 25. Z,. concinna. 



