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: II. 



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. hydro philoides 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: 



216. 1878. 



Uredo Solidaginis Schw. Schr. Nat. Ges. Leipzig i: 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, 1610. 

 On Carduaceae: II, III. 



Aster conspicuus Lindl.^ — Hilgard, Union Co., July 10, 1914, 1532; 

 Austin, Grant Co., Aug. 1915, J. R. Weir, 15Q. 



Aster Cuseckii Gray? — Corvallis, Sept. 21, 1914, 1548. 



Aster Douglasii Lindl. — Hood River, Aug. 26, 1915, E. Bartholo- 

 mew, 5P72 (Barth. Fungi Columb. 4911); Corvallis, June 29, 1914, 

 G. B. Posey, 13 10. 



Aster foliaceus frondeus Gray^ — Hood Ri\er, 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 Ilallii Gray — Corvallis, July 29, 1914, 1471; Wren, Benton 

 Co., July 26, 1914, 1318. 



