What is "tuber aestivum"

Truffle \Truf"fle\ (?; 277), n. [OF. trufle, F. truffe; akin to Sp. trufa, tartufo; of uncertain origin; perhaps from L. tuber a tumor, knob, truffle. Cf. Tuber, Trifle.] Any one of several kinds of roundish, subterranean fungi, usually of a blackish color. The French truffle ( Tuber melanosporum) and the English truffle ( Tuber [ae]stivum) are much esteemed as articles of food.

Truffle worm (Zo["o]l.), the larva of a fly of the genus Leiodes, injurious to truffles.

The summer truffle (Tuber aestivum) or burgundy truffle (Tuber uncinatum) is a species of truffle, found in almost all European countries.