Davis—Notes on Parasitic Fungi in Wisconsin — IX, 263 
restricted and the parasite disappeared therefrom in 3 or 4 years. 
It was not seen again until found at Babcock (1919) again very 
restricted in a low spot in the river bottoms. In 1920 it was found 
at Caryville, this time in more abundance, in an oxbow of Coon 
creek where it flows through the bottom lands along the Chippewa 
river and again in small quantity at Durand on the bank of the 
Eau Galle river near its mouth. From the situations in which 
this parasite has been observed it would appear that infection of 
the host is favored if the water in which the zoospores develop is 
impounded, thus preventing the carrying away of the infecting 
agents. 
Synchytrium scirpi Davis. The collections of this form have 
been made only in the vicinity of Racine. It was first observed in 
1904 southwest of the city and later northwest also, and appeared 
in the same places in successive years. It has been found upon the 
single species of host Scirpus atrovirens. It is possible that it is a 
form of the following species. 
Synchytrium aureum Schroet. To this species are referred col¬ 
lections on a considerable number of hosts of widely different 
affinities and additions are made to the list yearly. When young 
and especially on succulent hosts the sori, as seen through a hand 
lens, are golden yellow, the color due apparently to the content of 
yellow oil. When older this disappears and the sori, in section 
are whitish. I have not seen an authentic specimen of Synchytrium 
glohosum Schroet. but judging from the description some of the 
Wisconsin collections could be placed in that species. My observa¬ 
tions lead me to suspect, however, that they represent a single 
species in different stages and on hosts of different character. 
The distribution is quite general as is indicated by the following 
list of collections: 
Clintonia borealis, Athelstane, July 24, 1915. 
Geum virginianum, Berryville, July 3, 7 and 14, 1892; August 
30, 1892; June 10, 1894; October 9, 1894. Some of these are 
labelled ^^Geum alburn/^ (G. canadense.) 
Geum strictum, Two Rivers, July 17, 1918. 
Bubus triflorus, Turtle Lake, September 3, 1914; Solon Springs, 
August 6 and 14, 1915; Two Rivers, July 17, 1918; Bruce, 
September 4, 1918; Mosinee, September 1, 1919. 
