STUDIES OF THE PHYCOMYCETES OF IOWA 
J. M. RAEDER 
INTRODUCTION 
Numerous papers and valuable collections of the Fungus Flora 
of the state have been contributed by earlier botanists. Due . to 
the effort of such men as Halsted, Bessey, Arthur, Hitchcock, 
Hoi way and Pammel, a collection of over 200,000 specimens of 
the fungi of the state is assembled in the herbarium of Iowa State 
College and other prominent herbaria in America. These collec- 
tions are listed and described in various papers which are scat- 
tered in numerous publications over a period of a half century. 
It is obvious, then, that in order that such material be of value 
to students of mycology, it would seem desirable to collect it into 
some tangible form, by reexamining the specimens in the herbar- 
ium of Iowa State College, revising the' nomenclature to conform 
to the more recent researches, and collecting and summarizing 
the literature bearing on the fungus flora of the state. 
In the present paper the author has confined his efforts to one 
group, the Phy corny cetes. 
PHYCOMYCETES 
Olpidiaceae 
Olpidium saprolegniae Braun. 
*Achlya sp. (1). In terminal cells. 
Synchytriaceae 
Synchytrium anamalum Schroet. 
Adox moschatellina (1). Holway; Decorah. 
Synchytrium anemones (D. C.) Wor. 
Anemone cylindrica. Ames; 1909. 
Synchytrium decipiens Earl. 
^Amphicarpa sp. (1). 
Amphicarpa monoica. Welch ; Moingona, September 1900'. Thomas ; 
Ames, July, 1878. Anderson; Decatur Co., June, 1897. Melhus; Decorah, 
1918. 
Amphicarpa pitcheri. Anderson, Decatur County, July, 1905. 
Apios tuberosa. Pammel; Ames, September, 1909. 
Synchytrium Holwayi Farl. 
*Monarda sp. (12). 
Saprolegnia ferax Gruith, Nees, Kutz. 
*‘Dn dead fish, cray-fish, etc., floating in water" (1). 
Achlya prolifera Nees. 
*"On decaying flies in water”. (1). 
* Not present in Herbarium. 
