Here is what you know about the mushroom plant. It bears mushrooms that can be picked during spring. The small, light brown sponge mushroom is known to be an excellent food source. The plant appears as A mushroom lies decaying here. A mushroom lies decaying here. Mushrooms are quite tasty if harvested in the spring. They can be found in Beachs, Swamps, Trails, Hills, Plains, Valleys, Jungles, Fields, Forests, Mountains, Shallows, Waterfalls, Highlands and Deepforests.