A few areas on our lower slopes here are pretty much waterlogged year-round. Even if the surface appears relatively dry, a couple inches below it is basically waterlogged. Assume acidic, leached soil. We're looking to plant trees that can tolerate being wet all the time or at least most of the year. Please recommend something that you think is readily available in Peru. Fast-growing is big plus. So far, the only trees I can think of are Aguaje (Mauritia flexuosa) and (Huasai) Euterpe precatoria. Those aren't very fast.
How about Araca (Eugenia stipitata, feijoi)?
It doesn't have to be a fruit tree either. If there is a good timber species I'm open to that as well.