PLANTS OF IOWA 27 



ASCOMYCETES. 



SACCHAROMYCETACEJE FAMILY. YEASTS. 



Saccharomyces, Meyen. 



266. 8. cerevisicB, Hansen. 

 Cultivated yeast in breweries. 



267. 8. pastorianus, Hansen. 



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



268. S. ellipsoidens, Hansen. 

 On decaying grapes. 



269. S. apiculatus, Kiess. 

 In decaying grapes. 



270. S. mycoderma, Riese. 



Mould on the surface of fermented liquor. 



EXOASOILE FAMILY. WITCHES BROOMS. 



Exoascus, Fuckel. 



271. E. communis, Sadebeck. 



On Prunus americana, Primus cerasus and P. domestica. 

 Nursery stock sometimes defoliated in August. 



272. E. deformans, (Berk.) 

 Curl leaf of peach. 



273. E. mirdbilis, Atkinson. 

 On plum. 



274. E. pruni, Fkl. 



On plum leaves and twigs. 



275. E. farlowii, (Sadebeck) Saccardo. 

 On Prunus serotina. 



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



On Prunus hortulana and serotina. 

 Taphrina, Fries. 



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

 On poplars. 



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

 On oaks. 



279. T. johananii, Sadeb. 

 On aspen. 



