oes ARTHUR: NEW SPECIES OF UREDINEAE 
Uromyces Hellerianus sp. nov. 
O, I. Spermogonia and aecidia unknown. 
II. Uredosori hypophyllous, round, early naked, pulverulent, 
light chestnut-brown, encircling epidermis inconspicuous; uredo- 
spores globose, sometimes triangular-globose, 20-26 y in diam- 
eter; wall thin, 1.5—2, cinnamon-brown, pores 2 or 3, scattered. 
IIL. Teleutosori hypophyllous, round, early naked, pulveru- 
lent, dark chestnut-brown, encircling epidermis inconspicuous ; 
teleutospores globoid to ovoid, 21-24 by 27-36 y, rounded at 
both ends; wall smooth, chestnut-brown, thick, 3 4, apex with a ~ 
prominent, hyaline umbo, 7-11; pedicel less than half length of _ 
spore, delicate, colorless. 
On Cayaponia racemosa (Sw.) Cogn., Adjuntas road five miles 
from Ponce, Porto Rico, December 4, 1902, A. A. Heller, no. 
6206. Differs from Uromyces Cayaponiae P. Henn. especially in 
having smooth teleutospores with a large umbo. 
Puccinia Canadensis sp. nov. 
III. Teleutosori amphigenous, somewhat gregarious, pustular, 
coalescing, soon naked, pulverulent, chestnut-brown, remains o 
the membranous epidermis conspicuous ; teleutospores narrowly 
elliptical or linear-oblong, 10-15 by 37-58 y, ol.tuse at both ends ; 
wall thin, 1-2 4”, cinnamon-brown, minutely rugose, hyaline and 
thicker at apex, 3-5 4; pedicel delicate, very short, colorless, par- 
tially deciduous. 
On Viola orbiculata Geyer (type), Laggan, Alberta, August 23, 
1902, and Glacier, British Columbia, September 3,.1902; both 
collections by £. W. D. Holway. Hosts determined by Edward 
L. Greene. This species is the American representative of the 
European P. alpina, and like it belongs to the section Aicropuc- 
cinta. It differs in having paler and more slender spores, with 
more irregular sculpturing, which is so minute that it can scarcely 
be detected except when dry. 
In July, 1901, the writer with Mr. Holway published a paper 
in the Iiinnesota Lotanical Studies on the violet rusts of North 
America, in which Aecidium pedatum (Schw.) Arth., Puccinta 4 | 
Violae (Schum.) DC. and P. effusa D. & H., the then known spe- ) 
cies, were fully described. Since that time Mr. Holway has not — 
only collected the above additional species, but has also found P- 
Fergussoni B. & Br. on Viola Langsdorfi Fisch., at Glacier, B. C., 
= oe 10, 1901. 
