S. Trop. America as per WCSP;

Argentina Northeast; Argentina Northwest; Bolivia; Brazil South; Brazil
Southeast; Brazil West-Central; Guyana; Paraguay; Venezuela
as per Catalogue of Life;


Orchids seen at the Conservatory in ABG during my visit in October, 2018. 


Cant make out properly, but this is Catasetum. could be a hybrid, but I need to check proper image of single flower and whole plant.


I could find a few more pictures.
Hope these are helpful.
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After a lot of searching, I could find a picture exactly matching with my pictures. It says Catasetum fimbriatum.

But when I click on that picture, a slightly different picture opens. It says from Atlanta Botanical Garden. 
Are the flowers variable?


Looks like it, but there are so many hybrids that its hard to tell.