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 p, diam. 



Exoascus turgidus, Sadeb., Jahrb. der Hamburgischen 

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

 apex rounded or more or less narrowed, widening below to 

 about 15 p. wide; stem-cell conical, up to 30 p, 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. Anslalten, viii. 29, tab. 4, f. 4 (1890). Asci 

 36-40x8-9 p., stem-cell 10-15x8-9 p., not entering between 

 the epidermal cells, and not narrowed at the point; 

 ascospores 5 p. diam. 



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

 Fijrh., 1885, p. 38. Asci varying in length between 41-55 p-, 

 and up to 15 //, 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 p., stem-cell 3-6 p. high, 

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



Taphrina johansonii, Sadeb., Jahrb. der Hamburgischen 



