278 



Mycologia 



when opening a gate for County Agent Cooney of Klickitat Co., when going 

 into a wheat field. A piece of brome grass was picked and the kernel 

 smashed. A dark dusty mass fell into his hand and a careful examination 

 resulted in the finding of this smut. 



Tilletia rauwenhoffii Fisch. de Wald. Apergu, p. 50. ' 



Syn. Tilletia hold (West) Rost. Danish Fungi by J. L'ind., 1913: 266. 

 1913. 



Sori irregular, in ovary of host, dark, spores reticulate, in two layers. 

 An inner layer olive brown, an outer layer visible on the periphery of the 

 spores, hyaline, side hexagonal, not very prominent hexagonal reticulations. 

 Spores 22-30 fi diam. 



On Holcus lanatus, Kelso, Cowlitz Co., Wash. Aug. 6, 1919. 



Five collections at Kelso, Wash. Aug. 17, 19 19. Not very abundant. 

 This smut has 'previously been reported from Belgium and Denmark. So far 

 as the writer is aware this is the first report of this smut from North America. 

 Tilletia tritici (Bjerk.) Wint. Rab. Krypt. FL, i 1 : 110. 1881. 



On kernels of wheat, Bingen, Klickitat Co., Wash. Aug. 3, 1902 (W. N. 

 Suksdorf No. 996). 



Found on Triticum spp. — in every county of Washington. Most abundant 

 in the Palouse region of eastern Washington. Causes an annual loss in the 

 state of about $5,000,000.00. 



Ustilago avenae (Pers.) Jens. Chart). Cereales, 4. 1889. 



On Avena sativa, Prevalent west of Cascade Mountains, rarely found east 

 of the Cascade Mountains. 



Ustilago bistortorum (DC.) Korn. Hedwigia, 16: 38. 1877. 



On Polygonum sp., Mt. Adams (Mt. Paddo), Wash. Aug. 7, 1885 (W. N. 

 Suksdorf No. 198). 



Ustilago bromivora (Tul.) Fisch. de Wald. — Bull. Soc. Nat. Mosc, 40: 

 252. 1867. 



On Bromus eximius, West of Ice Cave, Skamania Co., Wash. Sept. 9, 

 1902 (W. N. Suksdorf No. 1021). 



On Bromus hookerianus, on banks of Columbia River, Klickitat Co., Wash. 

 June 1883 (W. N. Suksdorf No. 66). 



On Bromus hordaceus, Wawawai, Whitman Co., Wash. May 7, 1915 



(George, W. S. C. Path. No. C. S. 26) ; Pullman, Whitman Co.. Wash. 

 July 1, 1915 (G. A. Olson, W. S. C. Path. No. C. S. 130) ; July 10, 1916 

 (Dana, W. S. C. Path. No. C. S. 360). , 



On Bromus hordaceus glabrescens, Coupeville, Island Co., Wash June 

 19, 1919; White Salmon, Klickitat Co., Wash. Aug. 13, 1919- 



On Bromus marginatus, Aug. 18, 1904. Wentachee Mts., Chelan County, 

 Wash. (Cotton— W. S. C. Herbarium). 



On Bromus sp., Colfax, Whitman Co., Wash. July 19, 1919; Rosalia, 

 Whitman Co., Wash. Aug. 1, 1919- 



On Bromus sp., Washington State College Campus, Pullman, Whitman Co., 

 Wash. July 2, 1918 (W. S. C. Path. C. S. No. 516) also July 1919; Puyallup, 

 Pierce Co., Wash. July 16, 1919; Maryhill, Klickitat Co., Wash. Aug. 12, 

 1919; Stacker's Canyon, Klickitat Co., Wash. Aug. 14, 1919; LaConner, 

 Skagit Co., Wash. Aug., 1919. 



