LAIUATM-:. 83 



and becoming flat after dispersion of pollens. 



3 Anthers connate later Elskolteia. 



J Anthers connate immediately, and at last flat. 



f Calyx ovately tube-formed 5-toothed. Corolla 4-fid ; 



the anterior lobes most prominent .Pogostemon. 



tf Calyx ovate-campanulate, 5-toothed. Corolla nearly 



equally 4-fid Dysophylla. 



/?. Stamens descending, lying on the lower lip or involved by the 

 latter. 

 1. Lower lip short, strongly curved, sacciformed, contracted at 



the base Hyptis. 



2. Lower lip longer, concave or boat shaped, contracted at the 

 base, but not strongly curved. 



Filaments all free Pleetranthus. 



Filaments connate at the base Coleus. 



3. Lower lip hardly longer, but narrower, than the upper lip, 

 flat or slightly concave. 



Mature calyx witli entire inwardly curved lower-lip. 

 Calyx in fruit tubiformed ; verticillaster not capitate. 



Mesona. 



Verticillaster capitate Acrocephalus. 



Mature calyx with 2-toothed lower-lip. 



Verticil 1 aster capitate Acrocephalus. 



Verticillaster not capitate Ocimum. 



A jug a LINN. 



Key to species. 



1. Leaves nearly glabrous obovate or rhombic, obtusely dentate or lobulate. 

 1 . A. dictt/ocarpa. 



Leaves hirsute obovate-spathulate 2. 



'2. Leaves repando us ; 2. A. bracteosa. 



Leaves obtusely dentate A. genevensis. 



