376 OUTLINES OF BRITISH FUNGOLOGY. 



203. ASCOMYCES, Mont, and Desm.* 

 Pai-asitic. Receptacle uoue. Asci forming a thiii^ pulve- 

 rulcut stratum, mixed with moniliform threads. 



1. bullatus, 13. On pear-leaves. 



2. defonuaus, B. On peach-leaves, causing one form of blister. 



3. Trieutalis, B. On leaves of T. Earopcea. 



4. Jnglandis, B. (Gymnosporiuui leucospermmn, Mont.) On walnut- 



leaves. 



Oedeb24. TUBEBACEL 



Hypogseous. Hymenium waved and sinuate, often intri- 

 cate and closely packed. 



264. TUBER, Mich. 

 Asci short, saccate, disposed in sinuous veins. Sporidia 

 elliptic, reticulate, often echinulatc. Peridium warty or tu- 

 bercled, rarely smooth, without any definite base. 



1. brumale, Mich.; Ann. Nat. Hid. t. 18. p. SO : {no. 320.) 



2. Eestivum, Vitt. (Plate 23, fig. 2.) The common truffle of our 



markets. 



3. macrosporum, Vitt. {no. 580). 



4. bituminatum, B. and Br. (no. 586). 



5. rufum, Pico (no. 322). 



6. scleroneuron, B. and Br. (no. 582). 



7. nitidum, Vitt. (no. 321). 



8. puberulum, B. and Br. ; Ann. Nat. Hid. I.e. p. 81. 



9. dryophilum, Tul. I.e. p. 80. 



* This appears to be the lowest form under which Discomycetes can appear, 

 the way being made for it by Propolis. In outward aspect it has httle resem- 

 blance to more typical genera. 



