as far as foliage goes, i'm sure the size can be altered by light levels.
i'm not certain, but recall seeing jaboticaba, and eugenias that flowered under low light levels that had flowers with petals that were much larger than normal.
not sure what else your tree could be...
definitely not myrciaria or plinia...
(smelled some leaves crushed today, they are not really super aromatic, smell almost like apple, with a hint of resin)
The plant is in in nearly full sun with only a bit of dappled shade in late afternoon, to the point that there has been issue with leaf burning earlier in the year. The plant doesn't flush inside the house. Drops some older leaves in the spring. Leaf size has been getting bigger more or less as the plant has gotten bigger. Leaves on older, lower branches are small and more lanceolate, while leaves on branches near the top tend to be four to five inches in length and relatively wide.
The flowers that bloomed yesterday had their petals gone today. It's the first I have heard that dim lighting will affect flower size and shape. Does not seem to be true of citrus or E. uniflora. What exactly does low light do to flowers?
Seed variation doesn't have enough explanatory power when you have to check against all of Myrtacae, it seems. I mean, the right seedlings of E. victoriana and M. aureana probably can get a least a double take before closer inspection...
