Fungi 9 c 



Leptosphaeria pi-ope borealem E. and E. 



On weathered root of Salix vulchra Cham. Bernard harbour, July 12, 

 1916, 100485. 



This collection is too old for certain determination of the species. The 

 features extant correspond with those of L. borealis. 



Leptosphaeria prope Hierochloa Ouds. 



On Dupontia Fischeri R. Br. Bernard harbour, Aug., 1915, 91325. 



Sporidia 5-septate, third cell larger than the others, the cells mostly about 

 11 fi in each dimension in the largest spores. 



As a rule, the size and form of the asci and sporidia in the Sphaeriaceae are 

 so constant in the same species that the measurements and septation have 

 important diagnostic value. In the same perithecia in this collection these 

 organs show considerable digparity. The largest asci measured were fully 

 twice as large as the smallest ones. 



Massarina Dryadis Rostr. . 



On Dryas integrifolia M. Vahl. Bernard harbour, July 5, 1916. 



In the dense mass of small revolute leaves three fungi were found, namely 

 Mycosphaerella pachyasca, Pleospora sp., and a few leaves with a MassariaAike 

 species which is probably Massarina Dryadis Rostr. 



In the original description Rostrup does not give the measurements. The 

 sporidia here were 3-septate, constricted, 30-35 /i long and 15 n wide in the 

 widest part. Rostrup found his species on dead leaves of Dryas from Greenland. 

 Trelease found what he thought might be Rostrup's species on Dryas integrifolia 

 collected by Murdoch at Point Barrow, Alaska, upon which he makes the remark 

 "not entirely mature." 



The collector's note reads: "A yellow fungus-blight turning the leaves of 

 the common Dryas a yellow colour." From the material examined I could not 

 determine which, if any, of the fungi found caused the blighting of the leaves. 



Pleospora arctica Fuckl. 



On Oxytropis campestris (L.) DC. var. sordida Willd. Wollaston land, 

 Aug., 1915, D. Jenness, 98416. 



On stems of Epilobium latifolium L. Bernard harbour, July 30, 1915, 98750. 



Pleospora Drabae Schroet. var. nuda n. var. 



Peritheciis nudis; sporidiis constrictis. 



On leaves and stems of Draba nivalis Liljebl. Bernard harbour, July 17, 

 1915, 98657; August 7, 1915, 98662. 



Schroeter in Nord. Pilze gives the perithecia as surrounded at the base 

 by creeping hyphae, otherwise smooth. The perithecia on this material' are 

 naked but are collapsing and papillate as in Schroeter's description. The sporidia 

 are constricted and primarily 3-septate; when they become 6-septate the three 

 primary cells remain distinct; the larger part of the sporidium is superior to the 

 middle constriction. 



Pleospora herbarum (Pers.) Rabh. 



Synonymy in Ell. and Evrht. N. Am. Pyr. p. 335. 



On Elymus mollis Trin. Bernard harbour, Aug. 4, 1915, 91351; Martin 

 point, July, 1914, 91353. 



On Papaver nudicaule L. Konganevik, June 27, 1914, 97870. 



On Lesquerella arctica (Rich.) Wats. Bernard harbour, July 4, 1915, 98667. 



On Hesperis Pallasii (Pursh) T. and G. Bernard harbour, July 7, 1915, 

 98671. 



On Parrya arctica R. Br., mixed with Mycosphaerella. Bernard harbour, 

 July 10, 1915, 98704. 



