[2] The fruit body has a light brown outer skin (peridium) that can be rounded, have “lobes,” and may be furrowed or smooth.

[2] The range of the pecan truffle extends from the northern Mexico states of Nuevo León and Tamaulipas into Québec, Canada and from the eastern seaboard out to the southern reaches of the Rocky Mountains.

It is most commonly reported in association with Carya (hickories and pecans) and Quercus (oaks, the most receptive of Tuber symbiotes).

[1] One particularly productive habitat where T. lyonii has been found is in well-managed pecan orchards, particularly along the edge of herbicide strips.

In the southernmost part of its range through Florida and southern Georgia, fruiting may continue through the winter and as late as February.