H. vole´mi Pk. Subiculum very thin, whitish or isabelline; perithecia minute, brown, nestling in the subiculum; asci very slender, 100–125µ long, sporiferous part 4µ broad. Spores oblong-fusiform, 12–15µ long, 4µ broad, commonly binucleate.
Parasitic on the hymenium of Lactarius volemus. Pennsylvania. Charles McIlvaine.
The hymenium of the host plant is changed in appearance by the parasite, but the stem and upper surface of the pileus remain unchanged. Peck, Bull. Torrey Bot. Club, 27, January, 1900.
The edible qualities are in nowise affected by the parasite.
FAMILY.—TUBERA´CEÆ.
Tuber niveum or Terfezia leonis.
By courtesy Rev. A.B. Langlois.
A. Plant. B. Interior (section). C. Asci.
D. Spore.
Subterranean; ascophore irregularly globose, usually large, not rupturing.
To this family belongs the Truffle of commerce renowned for its flavoring qualities. It has not yet been found in America, though several fungi are ignorantly bought in our markets under that name; notably Coprinus comatus or maned mushroom. The writer has frequently been informed with all the logical force of genuine market-women that this was the real Truffle, because they raised it themselves.