Fungi 21 c 



DEMATIACEAE. 



Hormiscium stUbosporum (Cda.) Sacc. 



On Salix pulchra Cham. Camden bay, September 27, 1913, 93765. 

 On same host, Collinson point, June 13, 1914, 93809. 



Cladosporium herbarum (P.) Link? 



On Salix leaves. Sadlerochit river, November 13, 1913. 



Rhytisma? 



On young twigs of Salix rotundifolia Trautv. 



A black rhytismoid fungus not in fruit. Konganevik June 30, 1914. 

 Rhytisma salicinum (P.) is reported on the foliage of several species of willow 

 in Greenland. 



Needles of Picea canadensis (Mill.) BSP., collected at Sandstone rapids on 

 the lower Coppermine, February, 1915, by Mr. F. Johansen, and at Escape 

 rapids on the same river by Dr. R. M. Anderson in February, 1916, furnish an 

 unsolved problem. Mucedo-like tufts, concolorous with the dead leaves, were 

 found on nearly every leaf of the twigs collected but sporee were not found 

 in situ. Failure of the functions of the twig may have caused the death of 

 the leaves and dissections of the latter strengthened this supposition. I sub- 

 mitted affected material to Mr. J. R. Weir, Forest Pathologist at Washington, 

 D.C., who replied that he had not before seen spruce leaves in this condition. 

 He is disposed to agree with me that the fungus is saprophytic. A distorted twig 

 taken at the first named collection suggested to Mr. Johansen the effects pro- 

 duced by some species of Peridermium. In it I found the sloughs of Chermes- 

 like insects but nothing else. 



LIST OF NEW SPECIES AND VARIETIES 



Mycosphaerella immersa n. sp. 



" minor (Karst.) var. reticulata n. sp. 



Didymosphaeria Johansenii n. sp. 

 Pleospora Drabae Schroet. var. nuda n. var. 

 Dothidella sphaerelloides n. sp. 

 Leptothyrium pulchrum n. sp. 

 Leptostromella Drabae n. sp. 

 Discosia acuta n. sp. 

 Phrnna Cerastii-maximi n. sp. 

 Dendrophoma Lupini-arctici n. sp. 

 Diplodina minor n. sp. 

 Diplodia Calamagrostidis n. sp. 

 Septoria Ammodeniae n. sp. 



