JACKSON: UREDINALES OF OREGON 203 
From field observations made by the writer it is evident that in 
western Oregon this species overwinters in the uredinial stage. 
3. COLEOSPORIUM OCCIDENTALE Arth. North American Flora 7: 94. 
1907. 
On CARDUACEAE: IT. 
Senecio triangularis Hook.—Mary’s Peak, Benton Co., Aug. 15, 
1914, 1518. 
This species is known otherwise only from the type collection 
made in Falcon Valley, Washington, on S. hydrophiloides Rydb., by 
W. N. Suksdorf in 1900. 
The aecial connection is not known and no clues are available. 
The aecia, in common with other species of Coleosporium whose life 
history is known, should be looked for on the leaves of Pinus sp. 
The above collection, however, was made in a region where no pines 
exist in a radius of several miles. It is probable that this species, in 
common with some other members of the genus, is capable of being 
carried over the winter in the uredinial stage. 
The only pine-leaf-inhabiting Peridermium known to the writer 
in the present range of this species is P. montanum Arth. & Kern, 
which has been shown to be genetically connected with a Coleosporium 
on Aster and Solidago, referred to C. Solidaginis. 
4. COLEOSPORIUM SOLIDAGINIS (Schw.) Thiim. Bull. Torrey Club 6: 
296. 1878. 
Uredo Solidaginis Schw. Schr. Nat. Ges. Leipzig 1: 70. 1822. 
Peridermium acicolum Und. & Earle, Bull. Torrey Club 23: 400. 
1896. 
Peridermium montanum Arth. & Kern, Bull. Torrey Club 33: 413. 
1906. 
On PINACEAE: I. 
Pinus contorta Dougl.—North slope Mt. Hood, Aug. 7, 1914, 1670. 
On CARDUACEAE: II, III. 
Aster conspicuus Lindl.—Hilgard, Union Co., July 10, 1914, 1532; 
Austin, Grant Co., Aug. 1915, J. R. Weir, 759. 
Aster Cusecku Gray ?—Corvallis, Sept. 21, 1914, 1548. 
Aster Douglastt Lindl.—Hood River, Aug. 26, 1915, E. Bartholo- 
mew, 5972 (Barth. Fungi Columb. 4grz); Corvallis, June 29, 1914, 
G. B. Posey, 1370. 
Aster foliaceus frondeus Gray—Hood River, July 22, 1915, 3137; 
Clatskanie, Columbia Co., May 20, 1914, F. D. Bailey, 2564, Oct. 
29, 1914, 2531; Corvallis, June 29, 1914, G. H. Godfrey, 1307. 
Aster Hallit Gray—Corvallis, July 29, 1914, 1471; Wren, Benton 
@o., july 26; 1914;-F7 16. 
