738 TUBEEACEI.
1 ; ■!
Order X X IX . TU B E E AC E I.
Subterranean. Hymenium waved and sinuate, often intricate
and closely packed.
This differs from the Order vii. Hypogiei, in that the sporidia are contained
in asci.
Sporidia more or less elliptic—
Peridium rough. Asci saccate . . . . Tuler.
Peridium warty. Hymenium lacunose . . Balsamia.
Peridium warty, opening above. Asci cylindrical
................................................................ Oenea.
Sporidia globose—
Integument smooth. Asci clavate . . . Choiromyces.
Integument warty, opening above. Asci clavate
................................................................PachypMcms.
Integument papillose. Asci oblong . . Hydnotrya,
Integument cottony. Asci cylindrical . . Siepliensia.
lutegurnent downy. Asci elliptic . . . Hydnoholites.
Hymenium exposed. Asci linear . . . Sphmrosoma.
Sporidia globose, with radiating threads, starchy —
Peridium convolute. Asci saccate . . . Amylocarpus.
Sporidia concentric, at length dusty—
Integument hard. Asci nearly globose . . Elaphomyces.
Gen. 3 0 9 . T U B E R , Micb.
Pigs. 343.
Asci short, saccate, disposed in sinuous veins ;
sporidia elliptic, reticulate, often eehinulate ; pe-
ridium warty or tubercled, rarely smooth, without
any definite base.—Myc.p. 221. Tul. Hyp.
p . 188. Vitt. Tub. p. 181. Berk. Outl.p. 816.
(Figs. 343, 344 sporidia.)
Sect. A.—Epispore alveolate.
2 2 3 6 . T u b e i æ s tiv um . Vitt. “ Common Truffle.”
Rounded, irregular, large, 1-2 inches ormore in diameter, black-
brown, verrucose ; warts large, polygonal, pyramidal,^and transversely
striate ; veins very numerous, indistinct ; flesh whitish,
then clay coloured, orpale brown ; asci 4-6 spored; spores elliptic,
brown, reticulato-alveolate ; alveoli few and hroad.— Vitt.
Tub. p. 38, t. 2 ,f. 4. Tul. Hyp. t. l , f . 3. Corda Icon. vi. 1.18,/.
129. B e rh .Outl.p.81 6 ,t.2 8 ,f.2 . Goohe's B .F .t .28, f . l . Tuber
cibarium, Sow.t. 802. Hussey, t. 11. Eng. F I .y . p .228. T.bohe-
micum, Corda. Ic. vi. T. albidum, Fr. Sys. Myc.
In woods, especially of beech. Esculent.
Prom 1 to 3 inches in diameter, irregularly globose. The warts on the
surface of the peridium large, four to six-sided, longitudinally and irregularly
sulcate, the apex pierced or excavated and traversed chiefly about the
crown with shallow parallel strise. Sporidia ellipsoid, •0256-'032 m.m. long,
■0221-’025 m.m- broad, pallid tawny-yellow; epispore faveolo-plicate.
2 2 3 7 . T u b e r m ac iro sp o irum . V itt. “ Large-spored Truffle.”
Roundish ; peridium clad with minute, irregular tubercles,
covered with ferrnginous spots and fissures ; flesh compact; veins
scattered, numerous and interrupted, and mixed with obscure
lines; asci with long pedicels, 1-3 spored; sporidia elliptic,
very large, brown; epispore alveolo-reticulate, reticulations
small.— Vitt. Tub. t. i.f. 5. Tul. Hyp. t. 11, f . 8. B. & Br. Ann.
Hat. Hist. no. 580. Berh. Outl. p. 376.
In woods. Near Bristol.
Prom the size of a filbert to that of a walnut, or larger, ferruginous blaok ;
flesh at first white, compact, veins dirty-white -then pale-brown. Spores
visible to the naked eye, '055-’065 m.m. long, '032-'039 m.m. broad. Odour
strongly alliaceous.
2 2 3 8 . T u b e r b i tu m i n a t u m . B . & B r . “ Pitchy Truffle.”
Black, globose, or ovate, regular ; warts small and polyhedral,
with a deep hole excavated at the base of the tu b e r; veins
loosely coherent, for the most part originating from the margin
of the basal hollow; asci oval, with long pedicels ; sporidia
brown, ovate, loosely cellulose.—®. & B r.A n n . N.H. no. 581.
Berk. Outl.p. 376.
In deep sand. Oct. Bowood. Wilts.
“ Closely allied to T. cestivum, Vitt. but easily distinguished by the odour ;
it differs also in the general form, being much more regular, and the warts
smaller, and in the existence of a basal cavity prolonged into the substance
of the fungus, which is thus very light compared with T. aistimm. The veins
cohere very loosely, so that it is difficult to out the plant in half without
breaking it into frustules. I t shrinks very much in drying. The sporangia
have much longer stalks than in T. cestimm. The sporidia closely resemble
those of that species, but are slightly longer compared with their width, and
have somewhat shallower cells. I t ranges from the size of a walnut to that
of a hen’s egg.” Odour bituminous, and very strong of horse radish.-
M.J.B.
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