Arthur and Kern : North American Peridermium 135 
On Pinus oocarpa Schiede, Jalisco {Pringle). 
On Pinus palustris Mill., Florida (Rolfs), Texas (Spaulding) . 
On Pinus patula Schiede & Deppe, Hidalgo (Pringle). 
On Pinus pondcrosa Dougl.?, British Columbia (Communi- 
cated by Fraser , 1912), Washington (von Schrenk). 
On Pinus rigida Mill., New Jersey (Ellis, in N. Am. Fungi 
1022, Shear 1456) ; New York ( Lintner ) ; Ohio (Kellerman) . 
On Pinus sabiniana Dough, California (Colfax, Harkness 28, 
Newcastle, Feb., 1906, Shear, Placerville, Fawcett, Sept., 1913). 
On Pinus scopulorum (Engelm.) Lemm., Nebraska (Chadron, 
Aug. 7, 1909, Weaver; Long Pine, May 13, 1896, Bates 370, as 
on “Pinus ponderosa”) . 
On Pinus Taeda L., Alabama (Auburn, Earle, no date, April 
1896, Underwood, type of Per. fusiforme Arth. & Kern, April 6, 
1912, Arthur & Kern, April 7, Arthur, Lloyd, & Kern, March 22 
and April, 1913, Wolf, the latter two used for successful cultures 
on Quercus by the writers) ; Florida (Gainesville, Feb. 2, 1906, 
Rolfs, same locality, March 7, 1910, Burger, Lake City, Feb. 26, 
1909, Rolfs) ; Mississippi (Tracy). 
On Pinus virginiana Mill., Delaware (Seaford, April 24, 1908, 
Jackson)', District of Columbia (Washington, May 11, 1903, 
April 24, 1905, Shear) ; Maryland (Glen Sligo, May 5, 1905, 
Ricker; Takoma Park, May 10, 1906, Shear, used for successful 
cultures on Quercus by the senior writer; Takoma Park, April 
14, 1907, Shear; College Park, Sept. 20, 1910, Demaree) ; North 
Carolina (Durham, May, 1911, Wolfe) ; Virginia (Long, Shear). 
On Pinus sp., Georgia ( Ravenel , O’Gara). 
Type collected at Centre (now called Karner), New York, on 
trunks and branches of young pine trees, Pinus rigida, J. A. 
Lintner (the specimen in Herb. Peck bears in addition the date 
May, but no year is given). 
Distribution: Nearly throughout the United States, south- 
ward to central Mexico ; and northward along the mountains to 
southern Alaska. 
This species, as now represented, includes several of the forms 
which were previously regarded as distinct. The most notable 
advance in this connection has been the proof by our cultures this 
season (1913) that the fusiform specimens (Per. fusiforme A. 
