JACKSON: UREDINALES OF OREGON 221 



May 5, 1913, Comm. K. V. Miller, 1873; Eugene, Lane Co., Aug. 



1912, 1084; Talent, Jackson Co., May 18, 1916, F. C. Reimer. 

 Pyrus haccata Linn. — Lorane Valley, Lane Co., May, 1915, C. E. 



Stewart, 3387. 



Pyrus communis L. — Kerby, Josephine Co., June i, 1899, Comm. 

 E. F. Meissner, 1845; Brownsville, Linn Co., May 24, 1913, D. W. 

 Brumbaugh, 1911; Eugene, Lane Co., May 8, 1913, 3172, April 22, 

 191 5, 2620. 



Pyrus diversifolia Bong. (P. riviilaris Dougl.) — Cottage Grove, 

 Lane Co., June 13, 1913, 3175, 3211. 



Pyrus ioensis (Wood) Bailey — Cottage Grove, Lane Co., June 13, 



1913, 1854; Eugene, Lane Co., May 21, 1913, 3210. 



Pyrus mains L.— Eugene, Lane Co., July 10, 1913, J. O. Holt, 

 1787; Cottage Grove, Lane Co., May 23, 1913, C. E. Stewart, 1Q13, 

 June 20, 1915, C. E. Stewart, 887. 



Sorhus aucuparia Linn.^ — Cottage Grove, Lane Co., June 13, 1913, 

 3178; Eugene, Lane Co., June i, 1914, G. H. Godfrey, 3222. 



Sorbus hybrida Linn. — Cottage Grove, Lane Co., May 21, 1913, 

 3176, June 13, 1913,3167. 

 On Juniperaceae: 



Libocedrus decurrens Torr.^ — Eugene, Lane Co., Feb. 28, 1913, 

 J2IJ, Feb. 21, 1914, F. D. Bailey, 167^, Mar. 20, 1914,3070; Breiten- 

 bush Hot Springs, Marion Co., Mar. 27, 1915, E. A. Hartley, 2621; 

 Cottage Grove, Lane Co., Mar. 8, 1914, C. E. Stewart, 1888; Ashland, 

 Jackson Co., Sept. 10, 1914, 1839; Corvallis, Mar. 30, 1915, J. G. 

 Corsaut, goi; Grant's Pass, Josephine Co., Sept. 3, 1916, J. R. Weir, 

 185. 



This species is very common in its aecial stage on all the native 

 members of the Malaceae as well as most of the cultivated fruits and 

 ornamental plants belonging to this family which may occur in the 

 range of the incense cedar. There is considerable evidence also that 

 the disease is gradually spreading beyond the natural range of the 

 telial host. Observations made at Corvallis support this view. 

 Previous to 191 5 no specimens of this species had been collected in 

 Benton County though careful search had been made many times. 

 The incense cedar does not occur naturally in that locality but is 

 frequently planted for ornament. There are several fine examples on 

 the campus at the Oregon Agr. College. In 1915 a very sparing in- 

 fection of the aecial stage was found in the vicinity on native hosts 

 only, and the cedar trees on the campus were found to be sparingly 

 infected. Reports of the occurrence on quince have come from Salem, 

 far north of the natural range of the incense cedar. The writer 

 believes that the disease will gradually spread throughout the Wil- 



