259 
Affinities of British Tuber aceae. 
down giving it a pearly appearance, often cracked, 2-4 cm. diam. Gleba with 
whitish dissepiments radiating from the base. Asci subglobose. Spores globose or 
subglobose, orange-brown, reticulated, mesh not very large, deep, 35-45 n diam. 
Readily distinguished by the beautiful downy surface of the ascophore, through 
which the pinkish-brown colour shows. The ascophores are gregarious. Odour of 
radishes. 
Hab . In sandy ground. 
Distr. Britain ; United States. 
Exsicc . Cooke, Fung. Brit. Exs., 480; Rabenh., Fung. Eur., 1424. 
B. Epispore war ted or spinulose . 
Tuber brumale, Vitt., Mon. Tub., p. 37, pi. 1, fig. 6 (1831); Cooke, Brit. Fung., 
p. 740 (1871); Sacc., Syll., viii, p. 895 (1889); Chatin, La Truffe, p. 48, pi. 4 
(1892). Oogaster brumalis , Zobel, in Corda’s Icon. Fung., vi, fig. 127 (1854). 
Ascophore subglobose, generally regular in outline, reddish-violet then black, 
rough with polygonal warts having the apex excavated and crested with points, 
2-10 cm. diam. Gleba greyish-black with a tinge of violet, traversed by whitish, 
branched dissepiments. Asci numerous, subglobose or broadly elliptical, shortly 
stipitate, 3-6-spored. Spores elliptical or elliptic-oblong, yellowish-brown, spinulose, 
spines slender, 20-30 x 15-20 ^ . 
Distinguished amongst the species with spinulose spores, by the stout polygonal 
warts on the surface of the ascophore. Edible, said by Chatin to be the best kind 
after T. melanosporum , T. gulonum, and T. montanum . Size variable, sometimes 
larger than the measurements given above. Smell strong. 
Specimen in Herb. Kew., from Vittadini, examined. 
Hab. Underground. 
Distr . Britain ; France ; Italy. 
Exsicc . Speg., Dec. Myc. Ital., 1. 
Tuber rufum, Pico, Meleth., p. 80 (1788); Vitt., Mon. Tub., p. 48, tab. 1, 
fig. 1 (1831); Tul., Hypog., p. 141, tab. 6, fig. 2, and tab. 18, fig. 2 (1851); Cooke, 
Brit. Fung., p. 741 (1871) ; Sacc., Syll., viii, p. 897 (1889). 
Ascophore subglobose or irregular in form, minutely warted, cracked, rusty brown, 
2*5-6 cm. diameter. Gleba reddish-brown at maturity, dissepiments whitish then 
livid, mixed with tawny lines. Asci broadly ovate, shortly stipitate, 1-4-spored. 
Spores broadly elliptical or sometimes nearly globose, brown, densely covered with 
short spines, 25-36 x 17-24 n . 
The wall of the ascophore is thick and somewhat cartilaginous, colour somewhat 
variable but always more or less rusty. Smell also variable, at times not unpleasant 
and somewhat acid, at others strong and nauseous. The spores are almost indis- 
tinguishable in form and marking from those of T. nitidum , Vitt. Sometimes there 
is only one spore in an ascus, when it is very large and often almost or quite globose. 
Specimen from Vittadini, in Herb. Kew., also Berkeley’s British specimens, 
examined. 
Hab. In woods, underground or partly exposed. 
Distr . Britain ; France; Italy. 
T 
