138 Thirty-fifth Report o$ the State Musecjm. 



Septoria Cirsii, Niessl. 



Living leaves of Canada thistle, Cirsium arvense. West Albany. 

 June, 

 Septoria musiya, n. sp. 



Spots small, numerous, angular, brown, usually obscurely 

 mottled by minute angular patches of paler color ; perithecia few, 

 epiphyllous, depressed, black or blackish; spores cylindrical, 

 slightly curved, colorless, sometimes obscurely triseptate, .0012' 

 — 0018' long. 



Living leaves of cotton wood, Populus monilifera. Albany. July. 



This species differs from S. Populi, Desm., in the character of 

 the spots which are variegated like mosaic work, and in the septa- 

 tion of the spores. 

 Phyllosticta Crat^gi, n. sp. 



Spots small, angular or irregular, sometimes confluent, red ; 

 perithecia one to five on a spot, epiphyllous, minute, black; spores 

 broadly elliptical or subglobose, colorless, -0003' long, .00025' 

 broad. 



Living leaves of thorn bushes, Cratcegus tomeniosa. Albany. 

 July. 

 Phyllosticta variabilis, n. sp. 



Spots small or large, suborbicular or irregular, brown or reddish- 

 brown, the center at length dotted with whitish arid areas or be- 

 coming entirely arid, finally falling away ; perithecia minute, 

 epiphyllous, black; spores oblong-elliptical, colorless, -0002' — 

 • 0003' long, -0001' — 00012' broad. 



Living leaves of purple-flowered raspberry, Rubus odoratus. 

 Albany. September. 

 Protomyces macrosporus, Ung. 



Living leaves and stems of the great ragweed, Ambrosia trifida. 

 Albany. June. 



When this fungus attacks the stems it forms prominent swell, 

 ings which are generally about half an inch long and nearly as 

 broad and of a pale-green color. The spores are globose or sub- 

 globose and vary considerably in size, ranging from -0014' — 0024' 

 in diameter. They are imbedded in the tissues of the swellings. 

 Ustilago pallida, Sclircet. 



Flowers of wild buckwheat, Polygonum cilinode. 



Three species of smut occur on our knot- weeds. Ustilago 

 utriculosa is common on Polygonum Pennsylvanicum, U. Can- 

 dollei is found on P. sagittatum and U. pallida on P. cilinode, 

 Catskill mountains and Grafton, Rensselaer county. 



