Which is native to the Caribbean, Myrteola or Gesneria?
Gesneria:  Except for two or three odd South American species, all are native to islands of the Caribbean. Gesneria:  "Gesneria" species are usually woody shrubs or subshrubs, and (with the closely related "Rhytidophyllum") are unusual in the family in having alternately (rather than decussately) arranged leaves. Gesneria:  A complete list of the accepted species and their synonyms can be found in the Smithsonian Institution's World Checklist of Gesneriaceae.
i don't know