TUBEEACEI. 739 



129. Berh.Outl.p.2>lQ,t.2ZJ.2. Cooke's B.F.t.2S,f.l. Tuber 

 cibarium, SoLV. t. 30d. Hussey.t. 11. Eng. Fl.Y.p.228. T.hohe- 

 micu?n, Corda. Ic. yi. T. albidum^ Fr. Sys. Myc. 



In woods, especially of beech. Esculent. 



From 1 to 8 inches in diameter, irregularly globose. The warts on the 

 surface of the peridium large, four to six-sided, longitudinally and irregu- 

 larly sulcate, the apex pierced or excavated and traversed chiefly about the 

 crown with shallow parallel striae. Sporidia ellipsoid, '0256-'032 m.m. long, 

 '0221-"U25 m.m- broad, pallid tawny-yellow j epispore faveolo-plicate. 



2237. Tuber macrosporum. Vitt. *' Large-spored Truffle." 



Roundish ; peridium clad with minute, irregular tubercles, 

 covered with ferruginous 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. Tab. t. If. 5. Tid. Hyp. t. 17,/. 8. B. ^' Br. Ann. 

 Nat. Hist. no. 580. Berk. Oiitl. p. 376. 



In woods. Near Bristol. 



From the size of a filbert to that of a walnut, or larger, ferruginous black j 

 flesh at first white, compact, veins dirty-white then pale-brown. Spores 

 visible to the naked eye, 'OaS-'OCS m.m. long, •032-'039 m.m. broad. Odour 

 strongly alliaceous. 



2238. Tuber bituminatum. B. 4' Br. '* Pitchy Truffle." 



Black, globose, or ovate, regular ; warts small and polyhedral, 

 with a deep hole excavated at the base of the tuber ; 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. — i>. ^ Br. Ann. N.H. no. 581. 

 Berk. Outl.p. 376. 



Id deep sand. Oct. Bowood. Wilts. 



" Closely allied to T. cestivum, Vitt. but easily distinguished by the odour ; 

 it difi'ers 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. cestivum. The veins 

 cohere very loosely, so that it is difiicult to cut the plant in half without 

 breaking it into frustules. It shrinks very much in drying. The sporangia 

 have much longer stalks than in T. cestivum. The sporidia closely resemble 

 those of that species, but are slightly longer compared with their width, and 

 have somewhat shallower cells. It 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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