The black truffle has a symbiotic relationship with the oak tree in the Perigord region of France. Roughly 45% of the black truffle crop is found in southeastern France. via: http://truffleharvest.com.au/ - as seen in l&l collection no. 04, http://www.linenandlavender.net/2010/01/recipe-truffle-bruschetta.html http://www.pinterest.com/linenlavender/ll-collection-no-04/