TUBEEACEI. 741 



On tlie ground. Oct. — Jan. Esculent. 



When fresli the warts are of a bright brown showing in the interstices the 

 pale tint of the inner substance ; in drying the brown tint is entirely lost. 

 Sporidia small, elliptic, ciliated, but not reticulated. Veins very broad, 

 with narrow interstices. Spores ■02G-'032 m.m long, ■019-'023 m.m. broal. 

 Smell at length rather di3a^reea,ble. (F^-Q- 344 sporidiion.) 



2242. Tuber rufum. Pico. " Red Truffle." 



Subglobose, or irregular, from a quarter of an inch to an inch 

 in diameter; peridium thick, subcartilaginous, rimose, minutely 

 verrucose, tawnv ferru2:inous ; flesh at first soft and whitish, at 

 length reddish and firm, or horny ; reins from whitish becoming 

 livid, mixed with others that are tawny ; asci obversely egg- 

 shaped, 1-4 spored (generally 3) ; sporidia ellipsoid, tawny, 

 studded with sharp points. — Pico, p. 80. Vift. Tub. t. 1, /. 1. Tul. 

 Hyp. t. 6,/. 2, t. 18,/. 2. B. ^ Br. Ann. N.H. no. 322. Berk. 

 Outl.p. 376. Tuber cinereum, Tul. Giorn. Bot. Ital. yl. p. 62. Oo- 

 gasterrufus, Corda, Icon. vi. t. 16,/. 123. 



In woods. Kudloe, Wilts. Audley End, Essex. 



The odour is said by Vxttadini to be strong and nauseous. Variable in the 

 colour of the peridium. 



Spores •029.-032 m.m. long, •019--02i m.m. broad. 



2243. Tuber nitidum. Vdt. " Shining Truffle." 



Globose or depressed ; peridium thick, hard, smooth, shining, 

 and pallid ; flesh at first whitish, at length reddish-brown, hard; 

 veins whitish, rather numerous, principally diverging from a 

 whitish spot at the base ; asci egg-shaped, containing from 1-4 

 sjDores ; sporidia ellipsoid, reddish-yellow, densely echinulate ; 

 odour, when recent, nauseous. — B. 4' Br. Ann, N.H. no. 321. 

 Vitt, Tub. t. 2,/. 10. BerJ:. Outl.p. 376. Berk. exs. no. 303. Tul. 

 Hyp. p. 142. Oogaster nitidus, Corda. Icon. vi. t. 15,/. 117. 



In the ground. Hanham. Rudloe. tSpye Park. 



In the young plant the asci are precisely of the form of those in Cheiromyces 

 meandrifonnis, but with age they enlarge, and are at last oborate, as in T. 

 CBstmim. Distinguished from T.r^cfum by its smooth, pale peridium, and the 

 veins springing from a distinct, generally single, basal point. 



Spores •026-"030 m.m. long, •<»l(3--023 m.m. broad. 



2214. Tuber puberulum. B. 4' Br. " Downy Truffle." 



Gregarious, irregularly sublobate, clothed with short, erect 

 down, which gives it to the naked eye a peculiar pearly appear- 

 ance ; the white spots are very visible, even in dried specimens ; 

 peridium very thin and delicate, so that the pinky-brown colour 



