IOWA ACADEMY OF SCIENCE 
19 
stage of E. cichoracearum. In 1905 I found perithecia in abundance 
on both hosts. 
The data contained in this paper are mainly the result of two 
years’ observation on the family in Decatur County, together with 
an examination of the collections at the Iowa State College at 
Ames and the State University at Iowa City. The herbarium of 
Prof. B. Fink of Grinnell was also examined and the writer made 
some collections in Fremont and Ringgold counties. Unfortunately, 
a large portion of the collections at the State University were un- 
available at the time of the writer’s visit in June, 1905. 
Synonyms are given only so far as the Iowa literature consulted 
is concerned. Following the name of the host plant are given in 
their order the locality, time, and collector of specimens on that 
host. If any of these items are lacking its place is taken by an X. 
The name of the collector is in parenthesis. An asterisk (*) indi- 
cates the writer has not seen the specimen so indicated but it has 
been reported in the literature consulted. The measurements given 
in the descriptions are adopted from Salmon’s monograph of the 
family. 
ACKNOWLEDGMENTS. 
The writer’s thanks are due to Prof. B. Fink of Grinnell for the 
privilege of examining his private collection, mostly from the vi- 
cinity of Fayette; to Profs. Macbride and Shimek for courtesies 
extended when examining the collections at the State University; 
to Prof. Pammel and his assistants of the State College for the 
privilege of examining the collections at Ames and assistance ren- 
dered; to Miss King of the botanical department at Ames who 
executed most of the drawings ; and to others who assisted in vari- 
ous ways. Dr. Macbride has given much valuable information in 
regard to Phyllactinia corylea tomentosa. 
LIST OF IOWA WORKS CONSULTED. 
Bessey, C. E. — The Erysiphei. Seventh Bienniel Rep. Iowa Agricultural 
College; Preliminary List of Carpophytes of the Ames Flora; Bulletin, Bot. 
Dept. Iowa Agri. College, Nov., 1884. 
Fink, B. — Blights, Orchids and Ferns of Fayette, Iowa. Bull. Upper Iowa 
Uni., Jan., 1894. 
Hitchcock, A. S. — Partial list of Iowa Powdery Mildews. Bulletin. Iowa 
Agri. College, Nov., 1886. 
Pammel, L. H. — Powdery Mildew of the Apple. Cont. Bot. Dept. Iowa State 
College. Iowa Acad. Sciences, VII, 1899. 
