As long as it's raining consistently, you can find them everywhere for months; they grow out of trees, fallen logs, and stumps. Wild oyster mushrooms are the same as those grown comercially and sold in grocery stores. But the subtle aroma of the sea that emerges from a freshly cut oyster mushroom is worlds away from any store-bought product. The oyster mushroom is pale brown to white and often grows in clumps. Its gills are under the cap and reach all the way to the base.