Orton : Notes on Polemoniaceous Rusts 169 



periment Station, I was enabled to complete the examination of 

 the types or portions of types of nearly every species here dis- 

 cussed and some of the uncertainties existing heretofore appear 

 to be cleared up as thoroughly as it is possible to do so until cul- 

 tures are made to verify their life histories. 



Most of the uncertainties regarding the phlox rusts have cen- 

 tered around the well known species Puccinia phimbaria Peck, 

 which is a rather common rust throughout the Rocky Mountain 

 region on Microsteris and Phlox. Inasmuch as most of the con- 

 fusion has been due to uncertainties and errors in host deter- 

 minations considerable time has been given to the identification of 

 the hosts, particularly the hosts of the type specimens. These 

 have been submitted to various experts on this family such as Dr. 

 P. A. Rydberg, Mr. P. C. Standley, and others to whom I extend 

 thanks for their interest and the time they have taken from their 

 many duties to make these studies. 



For convenience in discussion, I have divided these rusts into 

 three groups as follows: (i) Allodus Giliac, (2) Allodus Doug- 

 lasii and (3) Other outstanding species. 



I. Allodus Giliae (Peck) Orton 

 Aecidium Giliae Peck, Bot. Gaz. 4: 230. 1879 



This species was founded on a collection by M. E. Jones from 

 Alta, Wasatch Mts., Utah, in August at an elevation of 8,000 ft. 

 on leaves of Gilia Nuttallii. A portion of the type collection in 

 the Peck herbarium was very kindly loaned by Dr. H. D. House 

 and was found to bear aecia only. The host is undoubtedly named 

 correctly and has been verified by Mr. Standley. 



Another collection in the Peck herbarium was made by Jones 

 at Alta, 10,000 ft. elevation, on the same host and bears only telia 

 which appear in every way identical with Puccinia plumbaria. 



Puccinia plumbaria Peck, Bot. Gaz. 6: 228. 1881 



Peck described this conspicuous rust on the living leaves and 

 stems of Collomia gracilis and Phlox Ion gi folia from material 

 collected by M. E. Jones in Utah and his description says in 

 " June and August." The most striking gross character of this 



