IOWA ACADEMY OF SCIENCES. 
205 
Americana, Baldwin and Cheney varieties. The Cheney plums 
and some forms of Prunus angustifolia were badly affected. I 
have never seen any indication of Exoascus Pruni on the culti- 
vated Prunus domestica here at Ames. 
dothidiacea:. 
Ottilia morhosa (Schw.), Ellis & Everhart. There has been 
the usual amount of this fungus. As yet it has not made its 
appearance on the cultivated Prunus Americana or Prunus angus- 
tifolia nor Prunus Cerasus, It has, however, been very destruc- 
tive to cultivated varieties of Prunus domestica. In fact there 
*■ were but a few varieties which were not affected. I have also 
seen it on Japan plums here at Ames. It also occurred on 
Prunus serotina and Prunus Americana when growing in the 
woods. 
Phyllacliora Graminis (Pers.), Fuckel. There has been very 
little of this fungus on the usual hosts, Elymus canadensis, Pan- 
dicotomum. 
PUyllacliera Trifolii (Pers.), Fuckel, has been quite abundant 
this fall during the months of September and October after the 
rains. Red clover (Tri folium pratense) was especially affected. 
UREDINE^. 
*I have elsewhere in a paper indicated the scarcity of rusts in 
general this year, especially grain rusts, Puccinia Graminis 
(Pers.), P. rut)igo-vera (D. C.), Winter, and P.-coronata (Cda.) 
P. graminis appeared in considerable quantity on fall sown oats 
in September and October, beginning after the August rains. 
It may be interesting to note that the leaves were abundantly 
affected with P. graminis instead of P. coronata as is the usual 
case. Cockle-bur rust {Puccinia Xantliii Schw.) occurred in con- 
siderable quantity. Puccinia comp>ositarum (N. A. F. 2252) was 
only found once on Iva xanitliiifolia in the western- part of the 
state. Corn rust {Puccinia Sorgliii) on Zea mays has not been as 
abundant as heretofore. 
Puccinia andropogonis on Andropogon scoparaius and A. furca- 
tus has not been abundant. 
Puccinia tanaceti (D. C.). Occurred in considerable quanti- 
ties on the cultivated sunflower {Helianthun annuus), and the 
cultivated Ilelianthus tuber osus, also on the wild forms of Helian- 
thus annuus, H. tuber osus and E[. grosse-serras. 
^Agricultural Science, vol. 8, p. 287. 
