| Tuber mexiusanum |
| This is a newly described (2013) Tuber species that ranges from Mexico and well into the northern United States; hence the specific epithet. Identification was confirmed by DNA analysis (thanks to Stephen Russell at Purdue University). Found in Monroe County, Indiana; June; in soil near oak trees. This truffle belongs to the same genus (Tuber) as the culinary-famed black and white truffles of Europe. Tuber mexiusanum has a pleasant flavor. This collection was formerly mis-identified here as Tuber Lyonii. |
| The spiny and reticulated ascospores of Tuber mexiusanum developing within asci, the spore producing cells of this fungus. Spore size varies depending on the number of ascospores within an ascus, which can range from 1-5. Ascospores in an ascus with one spore average 20-50 x 16-36 microns. |
| Asci globose to subglobose and sometimes exhibit a rudimentary pedicel. |
| See New North American truffles (Tuber spp.) and their ectomycorrhizal associations, US Forest Service |