Pinwheel Mushroom, Little Wheel, Collared Parachute,

Project Noah Fun Fact: Unlike other mushrooms known to release spores in response to a circadian rhythm, spore release in Marasmius rotula is dependent upon sufficient moisture. Dried mushrooms may revive after rehydrating and continue to release spores for up to three weeks—a sustained spore production of markedly longer duration than other typical agarics. ~Wikipeia Pinwheel Mushroom, Little Wheel, Collared Parachute, (Marasmius rotula) spotted in Loreto, Peru by PN member Irene Brady

These could also be Marasmius sp. or Mycena. I said Marasmius because these looks like Marasmius Rotula.