138 Forty- FOURTH Report on the State Museum 



Diplosporium breve n. «/>. 



Hyph^e. aBspitose, short, sparingly branched, white; spores 

 oblong", uniseptate, slightly constricted at the septum, colorless, 

 .0005 to .0006 in. long, .0002 to .00025 broad. 



On some effete Sphseria. Eedfield. July. 



Didymaria XJngeri Gd. 



Living leaves of northern buttercup, Ranunculus septentrionalis. 



Redfield. July. 



Bamularia destruens n. sp. 



(Plate*, figs. 4 to 6.) 



Tufts amphigenous, minute, gregarious, white, the hyphse 

 extremely short, .0002 to .0004 in. long ; spores elliptical or oblong, 

 colorless, .0002 to .0005 in. long, .00012 to .00015 broad. 



Li\dng leaves of mountain ash. Pyrus Americana, Hewitt's 

 pond, Adirondack mountains. July. 



This is a very destructive fungus. It quickly discolors and kills 

 the leaves. The discoloration in most cases appears to progress 

 from the apex toward the base of the leaf, which soon assumes a 

 brown and dead appearance as if burned by fire. The effect is 

 somewhat similar to that produced in the foliage of the apple and 

 pear by the " blight." Nearly all the leaves were killed on the tree 

 from which our specimens were taken. 



The fruiting part of the fungus breaks out here and there on the 

 dead leaves, but it is not abundant. The mischief is apparently 

 due to the rapidly spreading mycelium. The species is one of the 

 most minute of the genus, and is easily overlooked, though the 

 effect of its work in the leaves is painfully evident. 



Kamularia Junci n. sp. 



Spots transverse, brown; hyphse extremely short, csespitose 

 spores very slender, straight or curved, often slightly narrowed 

 toward one end, .001 to .002 in. long. 



Living leaves of Juncus marginatus. Selkirk. June. 



Ramularia graminicola n. sp. 



(Plate 4, figs. 1 to 3.) 



Spots small, numerous, irregular or subelliptical, pallid, sur- 

 rounded by a broad, indeterminate brownish border ; hyph^ amphi- 

 genous, short, colorless, .0005 to 001 in. long ; spores subcylindrical, 

 or fusiform, sometimes pointed at each end, sometimes becoming 

 spuriously uniseptate, colorless, .001 to .0014 in. long. 



