This is one of my strangest observations of ever. In a limited zone of the forest where this happened (say inside circle with radius of 20 m ) I saw some mushrooms (denominated parasite) growing over the cap of other mushrooms (the host). The parasites are all white when young and the cap became light brown powder like on maturity. I never saw such mushrooms, but the host looked familar, though in all cases were in decomposition. Thought that the host que could be a Lactarius , but this was denied by the microscopy . I brought home some samples and going to the microscope I almost had a "shock". The spores are something unbelivable , due to the ornamentation: imagine the spores of an Entoloma with warts much bigger than some Inocybe or Tuber, just to give a picture in words, since I attach photos of them . But the problem was that, either looking to the gill or to the pileipellis, nothing else but spores could be seem. Then selecting the youngest of my samples, could see that this is really a mushroom: it has hyphae, basidia and other structures like any other mushroom. What can it be?