242 
Mycologia 
7. Puccinia alternans Arthur 
The above is given as the correct name of the rust reported in 
the writer’s first list as Aecidium sp., No. 7. Dr. Arthur (Myco- 
logia 1 : 249. 1909) connects this with No. 1137 of the writer’s 
collection on Bromus Porteri (included in No. 93 of “ Smuts and 
Rusts of Utah ” as a specimen of Puccinia rubigo-vera). 
9. Gym nosporangium Nelsoni Arth. 
On Juniperus scopulorum Sarg. : 2133a, August 19, 1910, Mill 
D Flat, Big Cottonwood Canyon. These were old galls which 
had undoubtedly infected a small Amelanchier bush growing in 
the same clump with the Juniper, and bearing abundant aecia on 
its leaves. 
The galls have also been collected on the same host by Profes- 
sor C. P. Smith in Cache Co. (April 1910). Indeed, this is the 
commonest and most widely spread Gymnosporangium in Utah. 
Recently it has been found that the rust formerly called Gymnos- 
porangium durum is the telial form of G. Nelsoni. 
11. Melampsora Bigelowii Thurn. II. 
On Salix glaucops Anders.: 2263, August, 1911, San Juan Co. 
On Salix monticola Bebb?: 2187, July 2 &> I 9 II > Monticello, San 
Juan Co. On Salix pachnophora Rydb. : 2230, August 19, 1911, 
Spring Creek, Abajo Mts., San Juan Co.; 2,765 m. 
15. Melamsporella elatina (Alb. & Schw.) Arth. II. 
On Cerastium scopulorum Greene: 2249, August 19, 1911, 
Abajo Mts. near West Mountain, San Juan Co., alt. about 3,030 
m. On Cerastium Behringianum Regel: 2174, July 15, 1911, 
Gold Basin, La Sal Mts., San Juan Co.; alt. about 3,272 m. 
The aecial stage of this rust is Peridermium elatinum Schw. & 
Kze.,of which collections in Utah are recorded by Arthur & Kern 
in Bulletin Torrey Botanical Club 33: 435. 1906 as follows: Col- 
lected by Marcus E. Jones, Aug. 6, 1905, Black Mountain, Manti; 
by Pammel & Stanton (No. 642), July 27, 1900, Brush Creek, 
9,000 ft.; by Rydberg & Carleton (No. 7642), August 5, 1905, 
Aquarius Plateau. 
