6 c Canadian Arctic Expedition, 1913-18 



The Fungi of the Arctic Coast of America West of the 



100th Meridian 



Collected by the Canadian Arctic Expedition 1913-18 



By John Deaeness, M.A. 



MYXOMYCETES. 



No Myxomycetes were collected by the Canadian Arctic expedition. One 

 species was found by the Harriman Alaska expedition. In the consulted reports 

 of the Greenland expeditions six mjTcomycetes are listed. 



PHYCOMYCETES. 



The Phycomycetes, including the Mucors, Peronospores, and about a 

 dozen other less important families, must be rare in the arctic regions, for only 

 five species are named in the Alaska report, and seven species in the Greenland 

 lists. None were collected by the Canadian Arctic expedition. 



ASCOMYCETES. 

 SORDARIACEAE. 



No species of this interesting family were brought back. They are small 

 plants, nearly all of them growing in the ordure of animals. It is extremely 

 probable that several of them are existent in the territory. In the Amdrup expedi- 

 tion to northeast Greenland, between 69° and 74.30° N. lat., N. Hartz found 

 no less than nine different species growing in the droppings of animals, four 

 of them in Sordarieae and three in Ascoboleae. 



SPHAERIACEAE. 



Gnomonia sp. 



On leaves of Salix Richardsonii Hook. Camden bay, Sept. 1913, 93802. 

 Beak 400-500 n long, slightly enlarged at ostiole. Too old or too imperfectly 

 developed to determine the species. 



Mycosphaerella confinis (Karst.) 



Sphaerella confinis Karst. Myc. Fenn. II, p. 179. 



On leaves of Anemone parviflora Michx. Bernard harbour, July 4, 1915, 

 97828. 



Mycosphaerella eriophila (Niessl) 

 Sphaerella eriophila Niessl. Neue Kernp. p. 86. 



On Erigeron compositus Pursh. Bernard harbour, July 10, 1915, 98960. 



This species was found on the same host in Greenland. It is reported 

 on Artemisia in western Alaska. Doubtless it is a common arctic species. 



Mycosphaerella immersa n. sp. 



Peritheciis immersis, ostiolis erumpentibus, 270 /i in diam. Ascis 75 x 9-10 ix, 

 aparaphysatis. Sporidiis uniseriatis, hyalinis, ellipticis, uniseptatis, non con- 

 strictis, 15 X 8 iU. 



