128 
Journal of Mycology 
[Vol. 8 
Uredo polyphodii (Pers.) DC. — On Cystopteris fragilis, 
No. 1214, Merrill and Wilcox, Laramie River, 16 miles S. W. of 
Laramie, Wyo., August 22. 
Uromyces fraser.® Arthur & Ricker, sp. nov.— Sori am- 
phigenous, oval or elliptical, sometimes confluent, 1-2 mm. long; 
uredospores obovate elliptical 
or oblong, 22-32 x 19-26" //, 
with a colorless minutely ver- 
rucose membrane, and a green¬ 
ish yellow content; germ-spores 
numerous, scattered over the 
whole surface; teleutospores 
globose obovate or oblong, 
often somewhat angular, 25-35 
x 19-26 //, chestnut brown, 
wall medium thick, apex not 
thickened; pedicel fragile hya¬ 
line, 7-16x3//. On Frasera 
speciosa. No. 1211, Merrill and Wilcox, Wilson, Wyo., July 13. 
Figs. 1 and 2, four teleutospores and three uredospores, x 315. 
1 Uromyces geranii (DC.) Otth. & Wartm. — On Geranium 
sp. No. 1208, Merrill and Wilcox, Wilson, Wyo., July 13. 
Uromyces scutellatus (Schrank.) Lev.— On Euphorbia 
robusto. No. 1189, Merrill and Wilcox, Point of Rocks, Wyo., 
June 20. 
U. S. Dept. Agr., Bureau of Plant Industry. 
Washington, D. C. 
NORTH AMERICAN USTILAGINEAE. 
G. P. CLINTON. 
CONTRIBUTION FROM THE CRYPTOGAMIC LABORATORY OF HARVARD 
UNIVERSITY. 53. 
The following paper is a result of studies made upon this 
group of fungi by the writer during the past two years in the 
Cryptogamic Laboratory of Harvard University. It is prelim¬ 
inary to a monograph of the Ustilagineae of North America that 
he hopes to issue in the near future, the work on this having 
been largely completed. In the present paper there is given a list 
of the species with their hosts and distribution so far as is now 
known. Synonyms have also been given in those cases where 
needed to show the identity of the species. The writer’s studies 
have shown that a number of forms, described chiefly from this 
country, do not deserve distinct specific recognition and in such 
