IOWA ACADEMY OF SCIENCES. 
207 
Cladosj^ormn carpopMlum Von Thumen. Although this fun- 
gus has been very destructive to Primus Americoma, and in some 
years also destructive to cherries, it has not appeared so far as 
I know on these nosts this year. Mr. Stewart called my atten- 
tion to a Cladospcrium on a species of Crataegus. Later the 
same was found on another tree by Mr. Carver, which produces 
similar spots frequently encircling the whole fruit at the blos- 
som end. The mature spots have the characteristic olive brown 
color. 
MELANCONI^. 
Cylmdros 2 wrmm 2 ^cidi Karst. The entire absence of this fun- 
gus is one of the peculiarities of the season. While in 1893 this 
fungus was very destructive to young cherry seedlings as well 
as older trees, it was at no time abundant on nursery stock the 
past season, and very few leaves could be found on other trees. 
The disease occurred, however, on Prunus cerasus and P. avium. 
Helmintliosyiorium graminium Rabh. This fungus, which for 
several years past has been very destructive, appeared on some 
plants, but much less severe than heretofore. 
Cladosporium herharum (Pers.) Link. *This fungus has been 
reported by several observers as parasitic. I have on several 
occasions seen spikelets covered with this fungus apparently 
parasitic. It is indeed hard to say, however, since this fungus 
so commonly occurs on plants in a dying condition, and in fact 
everywhere on dead plants, it may be questionable whether 
this species is parasitic. Dr. Cobb finds it a serious trouble in 
New South Wales. 
TUBERCULARI^. 
Fusarium culmorum W. G. Smith. A serious enemy to wheat. 
Some yea;rs very abundant. It was only seen and reported a 
few times this year. 
PERISPORIACE^. 
The mildews have been more noticeable this year than other 
fungi, although they were less abundant than during the latter 
part of 1893. 
Splicerotlieca mali (Daby) Burrill. This fungus appeared in 
considerable quantity on young suckers in nursery in June, July, 
and continued, with some interruption in August, till well into 
October. 
*Frank, Krankbeiten der Pflanzen, p. 580. 
N. A. Cobb, Plant Diseases and How to Prevent Them, separate p. 10 from Agricul- 
tural Gazette, N. S. Wales, December, 1892. 
