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Panama to Venezuela and Ecuador as per WCSP;
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Rosenbergiodendron formosum :: Dattaji Salvi Udyan :: 01 MAY 18 : 7 posts by 4 authors.
Dattaji Salvi Udyan  Thane
Date: May 1, 2018 … Altitude: about 11 m (36 feet) asl

Rosenbergiodendron formosum  (Jacq.) Fagerl.
synonyms: Gardenia mussaenda L.f. • Mussaenda formosa Jacq. • Randia formosa (Jacq.) K.Schum. • Randia mussaenda (L.f.) DC. … and many more at The Plants List (2013). Version 1.1.

I think a new addition to efi site. One link is below:
Useful tropical Plants


Its synonym Randia formosa (Jacq.) K.Schum. is also a popular name among gardening sites.


i know it as Gardenia mussaenda


Yes, Gardenia mussaenda L.f. one of its synonyms, is also a popular name.