ELVELLACEI. 357 



a dense coating of long, slender, brown, flexuous. septate 

 hairs ; hymenium pallid ochraceous, with a tint of flesh- 

 colour. — Cke. Mycog.f. 111. 



On the ground under cedars, larch, etc. Spring. Fitcham 

 Park. Chiswick. Ware. Warwick, etc. 



264. TUBER, Mich. (p. 376). 



1. T. brumale, Mich. ; commonly 2 or 3 in. deep ; when 

 under cedars quite superficial. 



2. T. sestivum, Vitt. ; copses, hedgerows, and open 

 places in plantations, gregariously with other species of 

 Tuber, generally in plantations of beech, oak, or birch, 

 rarely pine ; on an argillaceous or calcareous soil. 



3. T. maerosporum, Vitt. ; in clayey places under oaks 

 and beeches, rarely willows and poplars ; sometimes rather 

 near the surface, at other times deep underground. 



4. T. bituminatum, B. and Br. ; this is the T. mesen- 

 tericmn of Vittadini ; in sandy ground, calcareous soils and 

 calcareous clays, deep beneath the surface. 



5. T. rufum, Pico ; two or three inches deep. 



T. nitidum, Vitt. ; this is merely the young condition of 

 T. rufum. 



6. T. scleroneuron, B. and Br. ; deep in sand or sandy 

 ground, sometimes in calcareous clays or calcareous soils. 



7. T. puberulum, B. and Br. ; in loose sand or leaf 

 mould, two or three inches deep. 



8. T. dryophilum, Tul. ; habit same as last. 



9. T. excavatum, Vitt. ; subglobose, 1 in. ; peridium 

 discrete, ochraceous, minutely verrucose, firm ; flesh horny, 

 cinereous- red, liver-coloured or tawny ; veins pallid ochrac- 

 eous. Jour, of Bot. 1865, pp. 11, 137, tab. 30. Generally 

 quite superficial, under dead leaves. Somersetshire. 



