Note 881 — BOOK XIX. THE NATURE AND CULTIVATION OF FLAX, AND AN ACCOUNT OF VARIOUS GARDEN PLANTS.
John Bostock translation
Fée takes this to be the Tuber niveum of Desfontaines, the snow-white truffle. It is globular and somewhat piriform, grows to the size of a walnut, and sometimes of an orange, and is said to be most delicate eating.