E. L. EKMAN, WEST INDIAN VERNONIiE. 37 



-j- Outer scales elongated, subfiliform. 

 Trinidad. V. Trinitatis. 



j"| Outer scales linear-lanceolate, acute. 

 Windward Islands, Margarita. 



V. arborescens. 

 3. Scales appressed, imbricated. 



-j- Cymes flexuose. Jamaica. 



V. acuminata var. 

 -{--j- Cymes straight. 



X Inner scales somewhat bluntish, often 

 purplish. Jamaica, Grand Cayman. 



V. divaricata. 

 X X Inner scales acute, never purplish. 

 Porto Rico Leeward Islands. 



V. albicaulis. 

 Leaves whitened, or at least densely tomentose 

 beneath. 



a. Pappus brown. 



a. Leaves sericeous beneath. Scales acute. 



f Heads 11 13-flowered. Hispaniola 



Leeward Islands. V. sericea. 



ff Heads 15 16-f lowered. Porto Rico 



Leeward Islands. X V. Gleasonii. 



3. Leaves tomentose beneath. Scales obtuse. 



Cuba. V. desiliens. 



b. Pappus white. 

 a. Leaves flat. 



f Leaves loosely tomentose beneath. 



X Cymes many-headed, often elongated. 



* Inner scales often purplish. Ja- 

 maica, Grand Cayman. 



V. divaricata. 

 ** Inner scales never purplish. His- 

 paniola V. fruticosa. 

 X X Cymes few-headed, often abbreviated. 



* Leaves acute, only the younger ones 

 whitened beneath. Cuba. 



V. crassinervia. 

 ** Leaves obtuse, all whitened beneath. 

 Cuba. V. gnaphali folia. 



f f Leaves densely tomentose beneath. 



