268 



Mycologia 



attachment of the stipe, but these differences are not considered 

 sufficient to divide the genus. Five thickly crowded half-tone 

 plates add greatly to the value of this excellent paper of 160 

 pages of text and 48 text figures. 



Species described as new in this paper are as follows : Stereum 

 caespitosum, Jamaica, Murrill; S. saxitas, Mexico, Murrill — also 

 Jamaica, Johnson; S. pub esc ens, Montana, Mrs. Fitch; S. coni- 

 cum, Cuba, Wright; S. patelliforme, Washington, Suksdorf — 

 also California and New Mexico ; 5. Earlei, Jamaica, Earle; S. 

 magnisporum, Jamaica, Murrill; S. spumeum, New York, Burn- 

 ham — also Pennsylvania, South Carolina, Louisiana, and Mexico ; 

 S. erumpens, District of Columbia, Shear — and known to occur 

 from Rhode Island to Alabama and west to Washington and 

 Oregon ; 5. sepium, Georgia, Humphrey — and known to occur 

 from Pennsylvania to Mexico and Colombia; S. heterosporum, 

 Mexico, Matthews — and known on the Pacific coast as far north- 

 ward as Oregon ; and S. durum, Mexico, C. L. Smith. 



In Bulletin 933 of the U. S. Department of Agriculture, on 

 Black Walnut, by F. S. Baker, the following statement is made 

 regarding the diseases caused by fungi : 



Black walnut is moderately free from tree diseases and is as 

 resistant to injury as any of its associates. Red butt rot is found 

 in a small percentage of trees, mostly old trees of northern 

 growth, although it is very bad in parts of central Kentucky. 

 As a rule the rot extends only a short distance up the tree, and 

 " butting off " the lower 3 or 4 feet of a hollow tree will usually 

 remove most of this defect. The " doty " zone that surrounds 

 the advanced decomposition at the center is generally narrow ; it 

 is frequently possible, in fact, to saw boards within an inch of 

 an open hollow before any discoloration appears. 



A white top rot is found, limited almost entirely to southern 

 logs, particularly from Oklahoma and Texas. Its presence is 

 indicated by punky knots and occasionally by conks on the upper 

 trunk. This rot extends a greater distance up and down the 

 trunk than the red butt rot and is a much greater detriment to 



