14 c Canadian Arctic Expedition, 1913-18 



Paraphyses gradually thickened at summit; sporidia 15-18 x 8-9 m- Fibers 

 of the sacking are retained in the mycelium at tase of stern. 



Scutellina scutellata (L.) 



Peziza scutellata L. (Fr. Sys. Myc. II: 85) 



Growing on rotten wood lying in water at Nome, August 20, 1916. 



This seems to have had a red-orange hymenium. The margin is beset with 

 long, rigid bristles, .5-1 mm. long; the sporidia are broad-elliptic, grumous, 

 19-21 fi. 



No Helvellas or large Pezizas were collected. I find only one species of 

 Morchella and one Helvella reported in the Greenland lists. 



Between 40 and 50 Pezizas or pezizoid species are enumerated in the Green- 

 land lists and twelve in the Alaska one (Harriman expedition). Mr. Berkeley 

 found two in the Nares collection, Peziza stercorea Pers., and Urnula Hartii Berk., 

 and Mr. Simmons found five in Ellesmere land, viz. : 



Sclerotinia Vahliana Rostr., 



Mollisia graminis (Desm.), 



Trochila juncicola Rostr., 



Trochila ignobilis Karst., 



Niptera melatephra (Lasch.). 



UREDINACEAE. 



Aecidium of (?) Uromyces Phacae-frigidae (Wahl.) Har. 



On hving leaves of Phaca frigida L. Bernard harbour, July 3, 1916. 



On the same host, Herschel island, August 9, 1914. 



Failing to connect this aecidial stage, whose golden coloured sori cover the 

 under surface of the leaves of its host, with the mature stage, I submitted 

 examples of it to Professor H. S. Jackson of Purdue University. He reports, 

 in effect, that the aecidium is quite new to the North American flora, and that there 

 is in northern Europe on this host a Uromyces described as having teleutospores 

 only, which are evenly distributed over the leaf surface. He is of opinion that 

 Uromyces Phacae-frigidae is an Opsis-Uromyces and that we probably have here 

 a hitherto undiscovered aecial stage of the fungus. 



Melampsora Bigelowii Thiim. 

 Uredo Bigelowii (Thiim.) Arth. 



On Salix ovalifolia Trautv. var. camdensis C. Schneider. Camden bay, 

 July, 1914, 93804. 



On Salix anglorum Cham. Bernard harbour, July 12, 1915. 



On Salix pulchra Cham. Collinson point, June 13, 1914, 93809. 



Uredinospores globose, rough, 18-21 /x, paraphj^ses with heads 23-30 n in 

 diameter and pedicels 45-65 x 6 m- The walls of the spores are 2 . 5-3 . 5 m thick. 



Melampsora arctica Rostr. has been found on three species of willow in 

 Greenland while M. Bigelowii is not reported from there in the lists consulted. 



Puccinia Arenariae Schum. 



Teleutosporic stage on living leaves of Merckia physodes Fisch. Near the 

 mouth of the Mackenzie river, 1893, Rev. Isaac 0. Stringer, 14264. 



One might reasonably have expected to find a considerable number of species 

 of this very large and widely distributed family of fungal parasites on one or 

 another of the 230 species of vascular plants, many of them in numerous speci- 

 mens, collected by Mr. Johansen and other members of the expedition. The 



