I actually have a few seedlings of Marcgravis Trinitatis. I saw one of these in Fairchild tropical gardens in Miami, FL
It was ginormous and in bloom, no fragrance that I could detect but the flowers were 20+ foot in the air, so that really means "not much".
I managed a trade for 5 seeds, 3 came up. The seeds looked like tiny grains of rice but maroon. At this point they are 6 months old and doing OK? A single plant could just barely over flow the head of a pin...soooo painfully slow.
I have been checking on EBAY and there is one for sale at this time, but it is a common shingle vine in the same family. Decent price only $10.00 plus shipping, but I am looking for some of the other odder types that have the funky flowers, if you looked them up you know what I am referring too....Sooooo strange STILL LOOKING