Then in the middle of a forest of trees covered with vines, fungi, orchids, lichens and moss, I run into a tree that is bare and smooth as silk. It's goiaba, or guava, as we say. The genus is Psidium. I'm not sure of the species, but probably guajava. It strikes me as being a very hard wood, but I'm not sure that's true. I know one thing for sure, the fruit is delicious.