I am sure-if England's truffle seller's hinted the uncinatum; they would realize its flag is million miles from the aestivum, though not inferior just eaten on another plate with itself. It keeps well now to be sliced for toast. Wet out of the Brandy jar. Not dark like the winter aestivum. Some-years its plenty here and now there but so far I have never found it or seen it in large quantities. I don't know what happens in France or if it has been commercially grown?
In England it seems to be a delicate fruit growing very near often feet away from the aestivum.We could call it something else "sweet truffle", its identification seems to be complicated held in the hand with the changing science from Microscope to genetics but nothing that can prevent the song of time and its joy