204 



Mycologia 



material, with an abundance of fresh aecia on the surrounding 

 Thalictrum plants. The collections of aecia listed under the 

 name of Aecid\ium sp. (No. 7 of this series of papers) belong to 

 Puccinia alternans. 



Dr. Arthur now considers Puccinia alternans to be a race of 

 Puccinia Agropyri Ellis & Ev. (Mycologia 7: 72)~7S- 1915)- 



9. Gymnosporangium nelsoni. I 



On Peraphyllum rarnosissimum Nutt. Collected by Professor 

 Marcus E. Jones (No. 6029), at Asays, Garfield Co., Sept. 11, 

 1894, alt. 2250 m. 



15. Melampsorella elatina (Albert & Schw.) Arth. 

 Peridermium elatinmn Schw. & Kze. 



On Abies sp. Collected by Professor Marcus E. Jones at 

 Strawberry Valley, August, 1883. 



This rust forms large witches' brooms on the alpine fir {Abies 

 lasiocarpa) . 



ly. Phragmidium ivesiae Sydow, Ann. Myc. i : 329. 1903 

 Ph. affine Syd. 



On Potentilla gloinerata A. Nelson: 2^4^: II, iii, July 24, 1917, 

 Emigration Canyon, Salt Lake Co. Host determined by . Dr. 

 Rydberg. The host of the collection reported from the Hot Pots 

 (No. 7^7) given in the original paper as Potentilla glomerata has 

 been determined by Dr. Rydberg^ as Potentilla dichroa Rydb. 



28. Puccinia balsamorrhizae Peck 



Mr. Wyatt W. Jones, botanist of the American Smelter and 

 Refining Company's Experiment Station, made a collection of 

 rust in II and iii in Salt Lake Co., May 10, 191 5, on Balsamor- 

 rhiza hirsnta Nutt., which is tentatively referred to this species. 



34. Puccinia cinerea Arthur. Ill 



On Puccinellia airoides (Nutt.) Wats. & Coulter. Collected 

 by Ellsworth Bethel, November 15, 191 7, at Marysvale, Piute Co. 



1 Bull. Torrey Club, 37: 490. 1910. 



