42 Thirtt-second Report on the &tate Museum. 



attacked. Usually a large brown spot is produced by the fungus in the center 

 of the leaf, the margin of the leaf remaining green. The affected leaves soon 

 shrivel and wither. In the case of the cherry leaves scarcely any green mar- 

 gin was left, and so rapid was the spread of the fungus that nearly the entire 

 leaf was discolored while it yet remained soft and flexible. A peculiar and 

 decided odor is diffused either by the affected leaves or the fungus. This odor 

 is perceptible in the dried specimens for a long time. The leaves of the shad- 

 bush are attacked along the midvein and veins. Sometimes the unripe fruit 

 is also attacked, the fungus causing it to rot quickly. Its destructive character 

 has suggested the specific name. 



Ramularia epfusa n. sp. 



Hypophyllous, effused, whitish; spores very variable, globose, obovate, 

 elliptical, oblong or cylindrical, .00016 -.0011' long, about .0002 broad, 

 occasionally uniseptate. 



Living leaves of black huckleberry, Gaylussaciaresinosa. Center. July. 



This species seems to be intermediate between Oidium and Ramularia. It 

 occupies the whole lower surface of the leaves, and often affects all the leaves 

 on a branch. The same or a similar species occurs on leaves of Cassandra 

 calyculata. 



Ramularia variabilis Fckl. , 



Living leaves of mullein, Verbascum Thapsus. Catskill Mountains. July. 

 The spots are rather small in proportion to the size of the leaf, and when 

 fertile are beautifully frosted on both sides by the fungus. 



Ramularia albomaculata n. sp. 



Spots suborbicular, two to three lines in diameter, sometimes confluent, 

 pale yellowish-green on the upper surface, whitened by the fungus on the 

 lower surface, at length becoming purplish or brown; spores oblong or elliptical, 

 generally binucleate, .0003'-.0004' long, .00016' broad. 



Living leaves of hickory, Carya alba. Albany and Grreenbush. June and 

 July. 



The spots are sometimes limited by the veinlets of the leaf and consequently 

 angular. The fungus is thus far limited to the lower surface. In some 

 instances there appeared to be creeping filaments indicating an intimate affinity 

 with Oidium. 



Ramularia angustata n. sp. 



Spots small, orbicular, sometimes confluent, pale greenish-yellow, frosted 

 beneath by the fungus ; flocci minute ; spores narrowly fusiform or subcy- 

 lindrical, .0003 -.0004' long, about .0001' broad, often containing two or 

 three nucleoli. 



Living leaves of pinxter plant, Azalea nvdiflora. Central Bridge and 

 Carlisle. June. 



The specific name has reference to the very narrow spores. 



