Natives of Columbia,Costa Rica, Equador

[onstead at connect.net]

Hello, I hope someone in this group can help me. 
I am doing a project for a hort. class and need help finding 
names of herbaceous & exotic plants,native to the above 
countries,which are used/sold commercially in the U.S.  No 
trees or shrubs please!  Plants for medicinal use are o.k.
Genus and species preferred, but common names will do.
 
You can send replies to my e-mail: onstead at connect.net

Thanks,
Mary