132 
Mycologia 
1892, A. J. Grout; on E. polystachyon L., Mt. Hood, Ore., at 5,000 
feet altitude, July 23, 1915, H. S. Jackson; on E. tenellum Nutt., 
at Isle au Haute, Me., Sept, ii, 1899, /. C. Arthur; on E. vir- 
ginicum L., at Avilla, Ind., August, 1884, W. B. VanGorder, 
Granville, Mass., August 1889, A. B. Seymour (Seym. & Earle, 
Econ. Eungi 54), Isle au Haute, Me., Sept. 6, 1899, /. C. Arthur, 
Central Village, Conn., Aug. 20, 1900, John L. Sheldon, Jackson, 
Ind., July 28, 1905, C. C. Beam, Elm Lake, Wis., Sept. 12, 1907, 
C. L. Shear, Winona Lake, Ind., Aug. 26, 1914, G. N. Hoffer; 
on E. viridi-carinatum (Engelm.) Eernald, at Avilla, Ind., Aug^ist, 
1884, W. B. VanGorder, Oneida, N. Y., June 27, 1915, H. D. 
JJouse; on Senecio aureus L., at Buffalo, N. Y., without date, G. 
W. Glinton, Decorah, Iowa, June, 1883, D. Holway, Ann 
Arbor, Mich., June 8, 1898, C. H. Kauffman, Mt. Chocorua, N. 
H., July 3, 1906, W. G. Farlow, Radisson, Wis., July 6, 1906, /. J. 
Davis, Merrimac, Wis., June 19, 1912, Davis & Arthur, Oneida, 
N. Y., June 27, 1915, H. D. Jiouse; on S. ductoris Piper, Mt. 
Hood, Ore., at 5,000 feet altitude, July 23, 1915, H. S. Jackson. 
It is evident that the rust is widespread in America, especially 
northward, but not particularly abundant, and the aecia have been 
collected over nearly the same territory as have the telia. 
The morphological differences between P. angustata and P. 
Eriophori are very considerable in the aecia, and while less marked 
in the uredinia and telia are yet noticeable. The urediniospores 
of P. Eriophori are more globoid, while the teliospores are some- 
what shorter ( 35-60 jx long, against 42-67 /x in P. angustata) and 
the apex thinner (4-10/A, against 7-16/11 in the other) with more 
tendency to acuteness. 
4. PucciNiA Agropyri E. & Ev. (P. alternans Arth.) — A col- 
lection on Festuca Thurberi Vasey, sent from Lake Eldora, Colo., 
by Mr. E. Bethel, was sown May 13, on Anemone cylindrica, 
Aquilegia canadensis, Glematis ligusticifolia, and Thalictrum 
dioicum. Infection was obtained on the last named host only, 
which began to show pycnia May 23, and aecia May 30. In send- 
ing this material Mr. Bethel wrote that he thought it had been 
derived in the field from aecia on Thalictrum Fendleri, which the 
culture confirms as highly probable. The first collection of this 
