20 c Canadian Arctic Expedition, 1913-18 



Mastomyces proboscidea (Fr.) Sacc. 



On branches of Salix sp. Southwest of Collinson point, June 7, 1914. These 

 interesting pycnidia are related to Scleroderris fuliginosa (Fr.) Karst. 



Diplodia Calamagrostidis n. sp. 



Pycnidiis nigris, inclusis, ostiolis erumpentibus, 270 /i. Conidiis fuligineis, 

 uniseptatis; basidiis 15-24 fi longis, plerumque 20 x 5-6-5 p.. 



In foliis Calamagrostidis purpurascentis R. Br. 



Pycnidia black, covered except the perforate ostiola, average size 270 /i. 

 Conidia f uUginous, uniseptate, on relatively short basidia, varying in length from 

 15 to 24 II, but mostly 20 x 5-6 -5 /i. 



On leaves of Calamagrostis purpurascens R. Br. Bernard harbour, August 

 14, 1915, 91330. 



Septoria Ammodeniae n. sp. 



Pycnidiis plerumque hypophyllis, valde numerosis, nigris, globosis, 80-90 fi. 

 Sporuhs rectis, hyalinis, 15-20 x 1-1-5 n. 



In foliis vivis Halianthi peploidis (L.) Fr. 



The leaves of the host plant are discoloured by the fungus. Pycnidia very 

 numerous, black, small, 80-90 n, globose, mostly hypophyllous. Sporules 

 straight or nearly so, 15-20 x 1-1 -5 ju. 



On languishing or dead leaves of Halianthus peploides (L.) Fr. West of 

 Martin point, July 30, 1914, 98330. 



This fungus was sought in both Septoria and Rhabdospora. The leaves do 

 not seem to be truly maculate. If the tissues of the host were known to be dead 

 when they were attacked by the fungus, an investigator would look for it in the 

 latter form-genus. 



Rhabdospora Drabae (Fuckl.) Berl. and Vogl. 



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

 97828. 



Sporules 18-23 x 1 -5 p in the middle, curved, Acutely pointed. 



Lind in his Micromycetes of Northeast Greenland devotes a page or more 

 to the discussion of the probable synonymy of this rather common species. He 

 names a dozen host-genera which it inhabits in Greenland; all of them are 

 dicotyledons. 



No Leptostromata or Sphaeropsides are reported in the Nares collections. 

 The 2nd Norw. Arc. From Exp. collections in Ellesmere land contained: 



Phoma Cichoriacearum Sacc. on Taraxacum hyparcticum. 

 " alpina Speg. on Saxijraga groenlandica. 

 " Caricis (Fr.) on Carex membranopacta. 

 Coniothyrium Saxifragae Rostr. on Saxijraga tricuspidata. 

 Diplodia Simmonsii Rostr. on Luzula arcuata. 

 Stagonospora Caricis (Oud.) on Carex nardina and C. misandra. 

 " Eriophori Rostr. on Eriophorum polystachyum. 



" Alopecuri Rostr. on Alopecurus alpinus. 



Septoria cercosperma Rostr. on Ranunculus affinis. 

 " semilunaris Joh. on Eutrema Edwardsii. 

 " minuta Karst. on Luzula arcuata. 

 " nebulosa Rostr. on Poa glauca. 

 " punctoidea Karst. on Elyna Bellardii and Kobresia caricina. 



