PLANTS OF IOWA 27 



ASCOMYCETES. 



SACCHAROMYCETACE.E FAMILY. YEASTS. 



SACCHAROMYCES, Meyen. 



266. 8. cerevisice, Hansen. 

 Cultivated yeast in breweries. 



267. 8. pastorianus, Hansen. 



In air and beer of breweries. (1, 2 and 3.) 



268. 8. ellipsoidens, Hansen. 

 On decaying grapes. 



269. 8. apiculatus, Bless. 

 In decaying grapes. 



270. 8. mycoderma, Riese. 



Mould on the surface of fermented liquor. 



EXOASOE-ffi FAMILY. WITCHES BEOOMS. 



EXOASCUS, Fuckel. 



271. E. communis, Sadebeck. 



On Prunus americana, Prunus cerasus and P. domestica. 

 Nursery stock sometimes defoliated in August. 



272. E. deformans, (Berk.) 

 Curl leaf of peach. 



273. E. mirabilis, Atkinson. 

 On plum. 



274. E. pruni, Fkl. 



On plum leaves and twigs. 



275. E. farloivii, (Sadebeck) Saeeardo. 

 On Prunus serotina. 



276. E. cerasi, (Fuckel.) Sadebeck. 



On Prunus Jiortulana and serotina. 

 TAPHRINA, Fries. 



277. T. aurea, (Pers.) Fries. 

 On poplars. 



278. T. ccerulescens, (Mont, and Desm.) Tulasne. 

 On oaks. 



279. T. johananii, Sadeb. 

 On aspen. 



