State Museum of Natural History. 



127 



Glceosporium irregulare, n. sp. 



Spots large, irregular, generally but one or two on a leaflet, brown 

 or reddish-brown ; acervuli numerous, hypophyllous, minute ; spores 

 elliptical, obtuse, .0003 to .0004 in. long, .00016 to .0002 broad, oozing 

 out and forming minute subglobose pale or whitish masses. 



Living leaves of ash trees, Fraxinus Americana. Menands. June. 



In the locality mentioned, this fungus has appeared on several 

 trees two years in succession. In some instances nearly all the 

 leaves are affected by it, and in consequence the foliage appears 

 badly blighted and injured as if by fire. 



Melanconium Tilise, n. sp. 



Heaps subcutaneous, minute, scarcely elevating the epidermis ; 

 spores ovate or subelliptical, involved in mucus, black, .0009 to .0011 

 in. long, .0007 to .0008 broad, oozing out and forming small black 

 dot-like stains on the matrix. 



Dead branches of basswood, Tilia Americana. Mechanicville. July. 



This species may be easily recognized by its minute heaps, small 

 spore stains, and by having its spores involved in mucus. 



Melanconium foliicolum, n. sp. 



Spots orbicular, brown or reddish-brown, surrounded by a narrow 

 darker border ; heaps hypophyllous, minute, black ; spores elliptical, 

 slightly colored, .0004 to .0005 in. long, about .0003 broad. 



Dead spots on living leaves of sassafras. Manor. Aug. 



Ustilago Osmundee, Pk. 



Living fronds of royal fern, Osmunda regalis. Knox, Albany 

 county. July. 



The fungus attacks the apical part of sterile fronds and thickens 

 and distorts the frond tissues. The fresh specimens show that it is 

 scarcely a good Ustilago, inasmuch as the spores appear to be borne 

 at the surface, and not to be deeply seated as in genuine species. Its 

 true affinity is not yet clear. The margin of the affected part of the 

 frond is sometimes whitened by minute fungous filaments. The 

 spores are globose, reddish-brown, slightly rough, .0004 to .0005 in. 

 in diameter. Probably it is an aberrant Uredo. 



Synchytrium aureum, Schroet. 

 Living leaves and petioles of strawberry, Fragaria Virginiana. 

 Sandlake. June. 



Peronospora sordida, Berk. 

 Living leaves of figwort, Scrophularia nodosa v. Marilandica. Know- 

 ersville, Albany county. July. 



