102 



Mycologia 



UREDINALES 



6. Puccinia interveniens (Pk.) Bethel in Univ. Cal. Pub. 7: 119. 1919 



Aecidium roestelioides Ellis & Ever. 

 Puccinia Burnettii Griff. 



The rust recorded under No. 101 of this list as Puccinia Stipae Arth. on 

 Stipa minor (Vasey) Scrib. should be placed here. This collection was made 

 Aug. 26, 1909, near Gogorza, Summit Co. Nearly defunct aecia on Sidalcea 

 nervata (listed as No. 6 of the " Smuts and Rusts of Utah ") were collected 

 the same day in the immediate vicinity. Mrs. Clemens had made a collection 

 of fine aecia in the same locality in May of the same year. 



8. Melampsora confluens (Pers.) Jackson, Brooklyn Bot. Gar. Mem. 1: 210. 



1918 



Caeoma confluens (Pers.) Schot. 



On Grossularia inermis (Ryd.) Cov. & Britt. : 2594, June 21, 1920, Gogorza, 

 Summit Co. The gooseberry bushes were growing under the willow trees, and 

 were very heavily infected. A single sorus was taken from the willows. 2621, 

 July 1, 1920, Henry Ranch, above Panguitch Lake, Garfield Co. 



On Grossularia leptantha (A. Gray) Cov. & Britt.: 2622, July 1, 1920, Henry 

 Ranch, above Panguitch Lake, Garfield Co. Another collection on this host 

 was made between Panguitch and Panguitch Lake. 



On Ribes petiolare Dougl. : 2741, O, I, August 16, 1920, above Silver Lake, 

 Big Cottonwood Canyon. The material was too old when collected, but Dr. 

 Arthur considers it to belong to this species of rust. The writer has previously 

 collected the rust on G. inermis within a quarter of a mile from where this 

 collection was made. Willows were within a few feet of the bushes of R. 

 petiolare from which the collection was made. 



On Salix Watsonii (Bebb) Rydb. : 2593, II, June 21, 1920, Gogorza, Sum- 

 mit Co. A leaf with a few sori was taken from one willow. The gooseberries 

 growing below were heavily infected with the Caeoma stage. 2637, II, July 

 15, 1920, same locality as No. 2593. The Caeoma on the gooseberries grow- 

 ing below the willows had all gone, leaving only scars on the leaves to show 

 where it had been. 2772, III, Sept. 12, 1920, East Canyon, Summit Co. 



9. Gymnosporangium Nelsoni Arth. 



On Jtmiperus utahensis (Engelm.) Lemmon : 2511, July 18, 1919, Price, 

 Carbon Co. 2607, June 25, 1920, Manti, San Pete Co. 2627, July 1, 1920, 

 head Mammoth Creek above Panguitch Lake, Garfield Co. 2639, July 17, 

 1920, Maple Canyon branch of Cedar Canyon, near Cedar City, Iron Co. 



On Juniperus scopulorum Sarg. : 2298, July 22, 1915, Logan Canyon, Cache 

 Co. 2600, June 23, 1920, McGee Canyon, near Santaquin, Utah Co. 2645a, 

 July 17, 1920, Maple Canyon branch Cedar Canyon, Iron Co. Some old cedar 

 trees at the head of Coal Creek branch of Cedar Canyon had nearly every 

 branch affected. 2698, July 29, 1920, Parowan Main Canyon, near Parowan, 

 Iron Co. 



On Amelanchier mormonica C. K. Schneider: 2718, Aug. 3, 1920, Beaver 

 Canyon, near Beaver, Beaver Co. Host determined by Dr. Rydberg. 



