THE SMUTS AND RUSTS OF UTAH 



A. O. Garrett 



This catalogue of smuts and rusts represents the results of 

 , eight years of the writer's field work, mostly in Salt Lake, Davis, 

 Summit, Wasatch, Utah, Weber and Sevier counties. The cata- 

 logue does not include a complete list of all species known to have 

 been collected in Utah ; but only those that have been collected by 

 the writer. 



As will be seen from the localities given, most of the collections 

 have been made in Salt Lake County. Unless otherwise speci- 

 fied, all of the canyons mentioned are those of the Wasatch 

 mountains in Salt Lake county. These mountains are a few 

 miles east of Salt Lake City, and run north and south. A spur 

 running east and west forms the northern boundary of the city. 

 City Creek Canyon, in this spur, is nearly due north of the city; 

 to the eastward comes Dry Canyon, and nearly due northeast of 

 the city. Red Butte or Reservoir Canyon. Directly east is Emi- 

 gration Canyon, the pass through which the pioneers came in the 

 early days. To the south of Emigration is Parley's Canyon, and 

 a mile to the south is Mill Creek, then Big Cottonwood, and 

 finally, three miles south on the boundary of the county, fifteen 

 miles southeast of Salt Lake City, is the mouth of Little Cotton- 

 wood. For the most part, these canyons have a length of about 

 fifteen miles ; and their altitude increases from about 5,000 feet 

 at the mouth to 8,000-11,000 feet at their head. In general, the 

 altitudes of Salt Lake County vary from 4,210 feet, the level of 

 Great Salt Lake, to 11,563 feet, at the summit of Twin Peaks. 



Great care has been taken both in the determination of the host 

 and of its parasite, all specimens having been submitted to spe- 

 cialists for their opinion. In this connection, the writer gratefully 

 acknowledges the assistance rendered by Dr. J. C. Arthur, Dr. 

 P. Sydow, Professor E. W. D. Holway, and Dr. G. P. Clinton 

 for the determination or verification of specimens of rusts and 

 of smuts ; and to Dr. P. A. Rydberg, Professor A. S. Hitchcock, 



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