High Quality Content by WIKIPEDIA articles! Tylopilus alboater, commonly known as the black velvet bolete, is a bolete fungus in the Boletaceae family. The species is found in North America east of the Rocky Mountains, and in eastern Asia, including China, Japan, Taiwan, and Thailand. A mycorrhizal species, it grows solitarily, scattered, or in groups on the ground usually under deciduous trees, particularly oak, although it has been recorded from deciduous, coniferous, and mixed forests.