142 ARTHUR: NEW SPECIES OF UREDINEAE 
with the telia, and intermixed with them, and also separately. 
The telia were also found at Pueblo, Colorado, by Mr. Bethel, and 
on September 13, 1911, Dr. F. D. Kern and the writer, following 
Mr. Bethel’s directions, visited the spot, but were only rewarded 
with aecia. On August 13, 1912, Dr. Kern repeated the visit and 
found plenty of telia. Both the position of the telia on the leaves, 
and their succession to the aecia on the same plants, indicate their 
genetic relationship. The telia may be described as follows: 
III. Telia chiefly hypophyllous, scattered, round or irregular, 
0.2-0.4 mm. across, early naked, pulverulent, cinnamon-brown, . 
ruptured epidermis noticeable; teliospores broadly ellipsoid or 
ovoid, 18-23 by 23-30 u, rounded at both ends, or somewhat nar- 
rowed below; wall cinnamon-brown, 1.5-2 thick, 4-5» above, 
including a low semi-hyaline umbo, smooth; pedicel colorless, 
fragile. 
The type collection, made by Shear & Bessey at Montrose, 
Colorado, July, 1897, showing only aecia, was distributed as on 
Atriplex Nuttallii, an error for A. confertifolia. 
Uromyces fuscatus sp. nov. 
I. Aecia amphigenous, in dense groups 3-5 mm. across; 
peridia short-cylindric, the margin erect, coarsely and deeply 
lacerate; peridial cells rhomboidal, 13-19 by 28-37 u, considerably 
overlapping, the outer wall 7-9 u thick, finely striate transversely, 
the inner wall 2.5-3.5 u thick, moderately verrucose; aeciospores 
globoid, 16-22 » in diameter; wall colorless, 1-1 .5 thick, finely 
and closely verrucose, often appearing smooth when wet. 
II. Uredinia amphigenous, scattered, round, 0.3-0.8 mm. 
across, elevated, early naked, puberulent, dark cinnamon-brown, 
ruptured epidermis pi ; urediniosp globoid or broadly 
ellipsoid, 18-24 by 22-29 yw; wall cinnamon-brown, 2-3 thick, 
closely and finely verrucose, the pores 3 or 4, approximately 
equatorial. 
III. Telia amphigenous, scattered, round or irregular, 0.5—2 mm. 
across, often confluent, early naked, prominent, dark chestnut- 
brown, ruptured epidermis evident; teliospores broadly ellipsoid or 
On Polygonum alpinum All., House Creek, Idaho, June 29, 
