206 
IOWA ACADEMY OP SCIENCES. 
Uromyces trifolii (A. & S.), Wint. Occurred on TrifoUum pra- 
tense during the month of September in certain places; more 
abundant during the month of October. 
AecicUum grossularice (D. C.). Has been abundant on several 
members of the genus Bibes, especially Bibes grossularice, B. gra- 
cile and B. rotimclifoUum, except for Aecidia on the barberry, 
gooseberry, composites and Oenothera early in the season. The 
cluster cup fungi were not abundant. 
Boestelia pijrata Thaxter. On Pyrus lowensis was not as 
abundant as in 1890. 
In the spring we found considerable quantities of the Cceoma 
inter stitiale Schlechtendal on the blackberry {Bubus villosus). 
Whole bushes over considerable areas in places were affected. 
If this is connected with Puccinia Peekiana it is strcmge that this 
rust should be so extremely rare. It has not been found here, 
although Mr. E. W. D. Holway writes me that he has found it 
at Decorah. 
Melampsora Populina (Jacq.), Lev. Occurred as usual on the 
cottonwood Populus monilifera. Some trees are more affected 
than others. 
Melampsora Salicina Lev. Occurred in some quantities on 
some of the wild species of Salix. 
Coleosporium Sonchi-arvensis (Pers.), Lev. Was not common 
except that Mr. G. W. Carver found a quantity of it growing on 
asters in the vicinity of Mud Lake, where there was consider- 
able moisture. 
Entomosporium maculatum Lev. Only a few specimens here 
and there on Pyrus communis. 
HYPHOMYCETES. 
Cercospora angulata Wint. Has occurred on Bibes rubrum but 
not severe. In 1893 it was very destructive everywhere in Iowa 
on this species. 
Cercospora baeticola Sacc. Occurred in September but not as 
destructive as in 1893. 
Monilia fructigena P. The total absence of this fungus 
during the early part of the season was very noticeable, 
whereas it was so abundant in 1891, 1892, and 1893 during the 
months of May, June and August. Later in the season, Sep- 
tember and October, it was found on wild plums [Prurms Ameru 
cana). 
