1917] - 
BURT—-MERULIUS IN NORTH AMERICA 357 
and Arizona. October and November out of doors; December 
to February in greenhouses. More common and more lux- 
uriantly developed in greenhouses. 
This species is noteworthy by its olive-ocher color, combina- 
tion of the hymenial characters of Merulius, Hydnum, and 
Irpex, and small, nearly subglobose, distinctly colored spores. 
Until the fructification is old, its hymenium is merely gyrose- 
plicate or showing only a few dissepiments prolonged into 
subulate teeth, and such specimens must be cautiously sep- 
arated from M. aureus. The latter is of somewhat similar 
color, but its fructifications are smaller, have the radial dis- 
sepiments the more prominent, and spores very pale, smaller, 
and cylindric. Fries included M. pinastri in the genus Hyd- 
num on account of the subulate teeth which are finally pres- 
ent in the best-developed specimens. I am strongly con- 
firmed in my opinion that this species really belongs in Me- 
rulius by its having been twice independently described as a 
Merulius with reference in the specific name to hydnoid char- 
acters and by the fact that all the collections so far distributed 
in the published exsiccati have been given out as Merulius 
aureus. I am indebted to Romell for a fine specimen of 
Hydnum pinastri with its European synonymy and showing 
well the unique characters of the species. 
Specimens examined: 
Exsiecati: Krieger, Fungi Sax., 1910, under the name Me- 
rulius aureus; Sydow, Мус. March., 1206, under the name 
Merulius aureus; de Thiimen, Мус. Univ., 1908, under the 
name Merulius aureus. 
Sweden: Stockholm, L. Romell, 388; Upsala, C. G. Lloyd, 
08411 (in Lloyd Herb.). 
England: Brandon-Norfolk, C. В. Plowright, in de Тъйтеп, 
Myc. Univ., 1908. 
Germany: P. Sydow, in Sydow, Myc. March., 1206; Saxony, 
W. Krieger, in Krieger, Fungi Sax., 1910. 
Austria-Hungary: Trento, G. Bresadola. 
Vermont: Middlebury, С. W. Dodge, 1066 (in Dodge 
Herb.). 
New York: Ithaca, Dudley, type of Merulius irpicinus (in 
wan aa << жы па. 
