Great Paulo and Adam, if we have photos of developing fruits, would it help?
Paulo: the leaves of the m coronata from the right are very similar to m jaboticaba, but bigger, for sure. So, m. jaboticaba leaves never grow larger than 3 or 4 cm?
I think this man should have some m cauliflora, because the "crown" on his fruits seems to be not so remarkable and not so colourful
More data:
It took 10 years to fruit
"My grandmother brought a plant from the Brazil jungle and she had it in her
yard for over 70 years (hence I got my mother plant), its 2 plants never exceeded 5m high (in 70 years).
In San Pablo they fruit 2 or 3 times a year.
Mine in the province of Corrientes, Argentina, is fruiting for me in October (spring), blooms in winter and always a little, few flowers, and sometimes offers one or 2 fruits in winter ... I think that because lack of water it does not bears in winter, and pulled the conclusion now because it rained a lot this winter and it has many flowers now...."
Does it helps?