ASCOMYCETES 359 



Exoascus amentorum, Sadeb., Sitz.-Ber. d. Ges.f. Bot. 

 z. Hamburg, iv., 1888, p. 90. Asci subcylindrical, base 

 more or less pointed, often immersed for one-third of its 

 length between the epidermal cells, 40-45 x 10 /*, stem-cell 

 absent ; ascospores usually 8, 5 //, diam. 



Exoascus turgidus, Sadeb., Jahrb. der Hamburgischen 

 Wissensch. Anstalten, x. 2, 59 (1893). Asci 46-50 ^ long, 

 apex rounded or more or less narrowed, widening below to 

 about 15 p wide; stem-cell conical, up to 30 //, long, 

 the pointed end passing between the cells of the host. 



Taphrina, Fries. Mycelium not perennial in the host 

 plant. Asci as in Exoascus, but the original 8 ascospores 

 produce quite early a large number of secondary spores, 

 consequently the ascus is crowded with minute spores as 

 soon as mature. 



Taphrina bullata, Sadeb., Jahrb. der Hamburgischen 

 Wissensch. Anstalten, viii. 29, tab. 4, f. 4 (1890). Asci 

 36-40 x 8-9 p, stem-cell 10-15 * 8-9 /*, not entering between 

 the epidermal cells, and not narrowed at the point; 

 ascospores 5 ft diam. 



Taphrina sadebeckii, Johans., Ofvers. af K. Vet.-Akad. 

 Forh., 1885, p. 38. Asci varying in length between 41-55 /*, 

 and up to 15 /x broad, stem-cell 18-22 p high, and fairly 

 thick, base rounded and but little, if at all, passing between 

 the epidermal cells ; ascospores 6 //. diam., secondary 

 conidia more frequently present in the asci. 



Taphrina ulmi, Johans., Ofvers. af K. Vet.-Akad. Fork., 

 1885. Asci very variable, for the most part short, cylin- 

 drical, apex rounded, 12-20x8-10 ^, stem-cell 3-6 //, high, 

 and 15-17 p broad ; ascospores 3-5 p diam. 



Taphrina johansonii, Sadeb., Jahrb. der Hamburgischen 



