Mas see. — The Structure and 
258 
( 1871 ); Chatin, La Truffe, p. 67 (1892); Sacc., Sylb, viii, p. 886 (1889); Vitta- 
dinion Montagnei , Zobel, in Corda’s Icon. Fung., vi, p. 75 (1854). 
Ascophore subglobose or irregular in form, with a basal depression, ochraceous, 
minutely granulated, 1 - 5-3 cm - diam. Gleba tinged ochraceous, becoming hard 
when dry, dissepiments white, radiating from the excavated base. Aset elliptical 
to subglobose, 2-4-spored. Spores elliptical or subglobose, reticulated, mesh large, 
deep, 35-53 X 30-40 /jl, yellowish brown. 
Distinguished by the minutely granulated or warted ascophore, furnished with 
a deep depression at the base. There are most frequently three spores in an ascus. 
Smell resembling radishes. 
Specimen from Vittadini in Herb. Kew. examined. 
Hab. Underground in woods. 
Distr. Britain; France; Germany; Italy; United States. 
Exsicc . Rabenh., Fung. Eur., 91 1. 
Tuber dryophilum, Tul., Giorn. Bot. Ital., ii, p. 62 (1870); Tub, Hypog., 
p. 147, pi. 5, fig. 3, and pb 19, fig. 8 (1851); Cooke, Brit. Fung., p. 742 (1871); Sacc., 
Sylb, viii, p. 889 (1889). 
Ascophore globose, generally regular in form, even, at first white and minutely 
downy, becoming glabrous and brownish-violet, variegated with violet, 1-5-3 cm- 
diam. Gleba reddish-brown or purple-brown with whitish dissepiments springing 
from various points of the cortex. Aset 2-4-spored. Spores broadly elliptical, 
orange-brown, reticulated, mesh rather large and deep, 40-45 x 25-30 /x. 
Characterized by the even wall of the ascophore, purplish gleba, and large, 
elliptical spores. More closely allied to T. Borchii , Vitt., a species not yet recorded 
for Britain. Smell weak, not unpleasant. Specimen from Tulasne, in Herb. Kew., 
examined. 
Hab. Underground, under oaks and poplars. 
Distr. Britain ; France ; United States. 
Tuber rapaeodorum, Tub, Ann. Sci. Nat., s£r. 2, xix, p. 380 (1843); Tub, 
Hypog., p. 147, pb 5, fig. 4, and pb 18, fig. 1 (1851) ; Sacc., Sylb, viii, p. 890 (1889) ; 
Chatin, La Truffe, p. 67 (1892). 
Ascophore globose or irregular in form, smooth, of a yellowish tinge and with 
whitish spots corresponding to the dissepiments in the gleba, 1-5-2 -5 cm. diam. 
Gleba white then brownish with a few white dissepiments. A sci obovate or sub- 
globose, 1-2, rarely 3-4-spored. Spores elliptical, reticulated, mesh large and 
somewhat elongated in the direction of the long axis of spore, shallow, 35-55 X 24- 
30 /x, yellowish-brown at maturity. 
The size of the spores varies considerably, depending on the number present in 
an ascus. Smell strong and unpleasant, resembling radishes. 
Hab. In sandy soil under trees. 
Distr. Britain ; France ; Germany. 
Exsicc. Fckh, Fung. Rhen., 2668. 
Tuber puberulum, Berk, and Br., Ann. Mag. Nat. Hist., xviii, p. 81 (1846); 
Cooke, Brit. Fung., p. 741 (1871); Sacc., Sylb, viii, p. 893 (1889). 
Ascophore subglobose, somewhat lobed, pinkish-brown, clothed with short, erect 
