892 Tuberoidese, Tuberace£e, Tuber. 



rhenanum Fuck. Fl. Rh. 1078, Tub. rhenanum ejusdem Syrub. 

 Myc. p. 247: superficie miiiute granulato-tuberculosa ; ascis 2-4- 

 sporis; sporidiis fuscis, dense, breviterqlie aculeatis (?), plerumque 

 70 :i 46, In sabuletis secus flum. Rhein Germauias (Fuckel). 



21. Tuber mutabile Quel. Ass. Fr. 1880, p. 11, t. VIII, f. 14. - 

 Subglobosum, subtus excavatum, atro-coerulescens, verrucis maxi- 

 mis 5-6-goniis apice excavatis, asperatum; gleba firma, ex albido 

 fuscella vinosaque, venis maculisque albis marraorata ; ascis pedi- 

 cellatis, 2-4-sporis ; sporidiis late ellipsoideis, ochraceo-fulvis, 40- > 

 50 .a. diam. 



Hab. ia arenosis in Jura Galiiae. — Verrucse 5 mm. crass.; 

 gleba valde aromatica. Affiue videtur T. biiuminato. 



22. Tuber bituminatum Berk. et Br. Ann. Nat. Hist. n. 581. — Glo- 

 bosum V. ovoideum, regulare, subtus cavitate profunde perfossurn, 

 nigrum, verrucis mediocribus polygoniisve; gleba venis laxe cohae- 

 rentibus, pleruraque e cavitatis basilaris margine exorientibus, per- 

 cursa; ascis ovoideis, longe pedicellatis ; sporidiis ovoideis, laxe 

 areolatis, brunneis. 



Hab. in arenosis in Wiltshire Britannise. — Fungus magDi- 

 tudine avellan^ v. ovi gallinacei; odor bituminosus. — T. cesiivo 

 affine, a quo differt forraa regulari, verrucis minoribus, ascis longe 

 stipitatis etc. 



II. SPH.EROTUBEa Paol. — Sporidia reticulato-alveolata, globosa. 



23. Tuber piperatum H. Bonn. Rev. Mycol. 1884, p. 138. — Globo- 

 sum, irregulare, rufescenti-nigrum, foveola basilari destitura, ver- 

 rucis majusculis, 5-0-goniis asperatum ; gleba lutea, prlmitus pal- 

 lida, senescendo luteo-brunnea, venis difformibns marmorata, aliis 

 numerosis, crassis, hinc inde nodoso-inflatis, aliis linearibus, ra« 

 rioribus, parum ramosis; ascis numerosis sphsericis, breviter sti- 

 pitatis, 1-6- ssepius 2-4-sporis; sporidiis sphccricis, crassis, reticu- 

 lato-alveolatis, alveolis, ob margines abrupte elevatos, aculeos si- 

 mulantibus, 28-30 a. diam. aurantiacis. 



Hab. prope Apt Gallise austr. — Fungus nucis juglandis ma- 

 gnitudine v. major; odor petrolei v. raphani, sapor piperinus. Af- 

 finis videtur T. bituminaio. 



24. Tuber fulgens Qu61. Grev. 1879, Ass. Fr. 1883, p. 11, t. VII, 

 f. 2. — Subglobosum, minute granulosum, aurantiaco-croceum, basi 

 foramine sulphureo pertusum ; gleba cornea, lacteo-arraeuiaca, venis 



