256 
Massee . — The Structure and 
Readily distinguished by the much lobed, smooth ascophore, which is shortly 
stipitate. 
Hab. In woods. 
Distr . Britain ; Italy. 
Tuber, Micheli, N. pi. Gen., p. 221, tab. 102 (1729); Link, Obs. in ordin. 
plant, Diss. I, p. 33, tab. 2, fig. 51 (1809); Vitt., Mon. Tub., p. 31 (1831); Cooke, 
Brit. Fung., p. 738 (1871); Sacc., Syll., viii, p. 882 (1889); Lycoperdon , pro parte, 
Linn., sp. PI., II, p. 1183 (ed. i) (1753). 
Ascophore irregularly globose, without a distinct rooting base, fleshy or sometimes 
becoming almost woody, surface glabrous or tomentose, often papillose or warted. 
Gleba marbled with veins, some white and sterile (air chambers), others coloured 
and producing asci on the walls. Aset broadly elliptical or globose, 1-12, most 
frequently 4-spored. Spores elliptical or globose, smooth, warted or reticulated, 
coloured. 
Distinguished by the differently coloured veins in the gleba, and the more or 
less globose asci. 
A. Epispore reticulated. 
Tuber aestivum, Vitt., Mon. Tub., p. 38. pi. 2, fig. 4 (1831); Cooke, Brit. 
Fung., p. 738 (1871); Sacc., Syll., viii, p. 891; Chatin, La Truffe, p. 62, pi. 9 
(1892); Hesse, Die Hypog. Deutschl., ii, p. 19 (1894). 
Tuber cibarium , Sow., Engl. Fung., pi. 309 (1797). 
Ascophore irregularly globose, often indented at the base, blackish-brown, 
covered with large, hard, pyramidal warts which are generally with the sides striated, 
2-10 cm. diam. Gleba whitish, becoming brown, dissepiments numerous, much 
branched. Spores 2-4 in an ascus, most frequently two, brownish, elliptical or sub- 
globose, reticulated, mesh large, rather shallow, 40-60 x 30-40 /x, or 30-40 /x diam. 
Distinguished by the coarsely pyramidally warted blackish ascophore, and the 
large spores with a shallow, wide-meshed reticulation. Among the best of our edible 
truffles, but very much inferior in this respect to the Perigord truffle, Tuber melano- 
sporum, Vitt., which does not occur in Britain. Taste somewhat insipid, smell 
somewhat resembling that of beer yeast. 
Specimen from Vittadini, in Herb. Kew., examined. 
Hab. In woods, especially of beech. Just below the surface of the ground, or 
sometimes above-ground amongst heaps of leaves, &c. 
Distr. Britain; France; Italy; Germany; Bohemia. 
Exsicc. Cooke, Brit. Fung. Exs., 663; Rabenh., Fung. Eur., 1425; Klotzsch- 
Rabenh., Herb. Myc., 246; Fckl., Fung. Rhen., 1077 and 1078; Roumeg., Fung. 
Gall., 2815 : Vize, Fung. Brit., 86 ; Thiim., Myc. Exs., 312. 
Tuber bituminatum, Berk, and Broome, Ann. Mag. Nat. Hist., vii, p. 183 (1851) ; 
Cooke, Brit. Fung., p. 739 (1871); Sacc., Syll., viii, p. 892 (1889). 
Ascophore globose or ovate, regular, black, covered with small polyhedral warts, 
with a deep depression at the base, 3-7 cm. diam. Gleba with the dissepiments 
starting mostly from the base. Asci subglobose, with long pedicels. Spores globose 
