376 ARTHUR: NEW SPECIES OF UREDINEAE 
Urediniospores with 7-12 scattered dis- 
tinct pores. U. bicolor. 
Urediniospores with 5-7 scattered indis- 
tinct pores (not in America). U. ambiguus. 
Teliospores rough. 
Teliospores two-celled (Puccinia). 
Teliospores coarsely verrucose (rarely on Allium) P. Calochorti. 
eliospores inconspicuously verrucose. P. pagana. 
Teliospores one-celled (Uromyces). 
Teliospores finely striate (rarely on Allium). U. primaverilis. 
Teliospores coarsely striate (not in America). U. reticulatus. 
Uromyces probus sp. nov. 
O. Pycnia not seen. 
I. Aecia amphigenous, on the veins in series I-3 mm. long, 
short, cupulate, 0.3-0.4 mm. in diameter; peridium erect or 
spreading, margin erose; aeciospores broadly ellipsoid, 18-21 by 
23-26y; wall colorless, about 1.5y thick, finely verrucose. 
II. Uredinia amphigenous, solitary or in crowded groups 
2-8 mm. across, oblong or linear, 0.5—5 mm. long, rather soon 
naked, light cinnamon-brown; urediniospores broadly ellipsoid, 
19-23 by 26-31; wall golden yellow, 2-3 thick, sparsely echinu- 
late with fine short points, pores 5 or 6, scattered. 
III. Telia amphigenous, scattered, numerous, oblong or 
linear, 0.5-4 mm. long, rather tardily naked, chocolate-brown, 
ruptured epidermis conspicuous; teliospores broadly ellipsoid or 
obovate-ellipsoid, 16-21 by 23-29u; wall dark cinnamon-brown, 
about 1.54 thick, slightly thicker above, 2-3u, smooth; pedicel 
slightly tinted, usually shorter than spore. 
On Olsynium  grandiflorum (Dougl.) Raf. (Sisyrinchium 
grandiflorum Dougl.), Columbia River, Wash., July 1893, W. N. 
Suksdorf (Ellis & Ev. N. Amer. Fungi 37 37). The type collection 
was distributed under the name Uromyces Sisyrinchit Mont., a 
name established upon the uredinia of Puccinia Sisyrinchii Mont., 
according to Messrs. Hariot and Sydow (cf. Sydow, Monog. Ured. 
1: 601). The only other species of Uromyces on Sisyrinchium 
known in either North or South America is the heteroecious species 
occurring in the eastern United States, U. Houstoniatus, which 
differs conspicuously from the western form not only in having 
its aecia on an unrelated host, but in the characters of the sori and 
of the urediniospores and teliospores. Beside the type collection 
another was made by Mr. Suksdorf on May 24, 1894, but otherwise 
with same data. A specimen of the same rust was collected on 
