88 NEW YORK STATE MUSEUM 



entire; spores oblong-ellipsoidal or oblong, hyaline, 4.5 to 5.5x2 to 

 2.5 fi; setae abundant, sharp-pointed, projecting conspicuously; 

 hyphae of trama and subiculum brown, nearly simple, 2.5 to 3.5 fx 

 in diameter, cross walls present but indistinct; no clamp connections. 



Overrunning moss. 



Type locality : Belleville, Ontario, Canada. Macoun. Not 

 otherwise known to the writer. 



Poria marginella (Peck) Sacc. 



Plate 9 



Syll. Fung. 9: 194. 1891. 



Polvporus margin ellus Peck, 42c! Rep't N. Y. State Mus , p. 122. 

 1889 (Bot. Rep't, p. 26). 



Original description. Resupinate, effused, forming extensive 

 patches, 1 to 3 lines thick ; subiculum distinct, firm, subcinnamon, 

 the extreme growing margin white, becoming dark-ferruginous with 

 age ; pores at first short, sunk in the tomentum of the subiculum, 

 then longer, minute, rotund, often oblique, brownish-ferruginous, 

 glaucous within, the dissepiments thick, obtuse. 



Dead bark and decorticated trunks of spruce, Abies nigra. 

 North Elba. Sept. 



Remarkable for and very distinct by the narrow downy white 

 margin that borders the growing plant. 



Notes. The type collection consists of two small pieces 5 to 7 

 cm square, mounted on a herbarium sheet, and several others pre- 

 served in a herbarium packet. Fortunately also, several other good 

 collections from different points in the United States are available 

 for comparison. The color of the hymenial surface is near snuff 

 brown, cinnamon brown, or more tawny, and the margin itself is 

 white in fresh plants but may become brown in herbarium speci- 

 mens. This margin is compactly tomentose, narrowly sterile, and 

 quite thin. The thickness of the hymenium-producing portion 

 varies from 1 to 5 mm, the larger thickness sometimes involving 

 the growth of two years, although for the most part the fungus is 

 strictly annual. The subiculum is conspicuous, bright tawny in 

 color and at times as much as a millimeter thick. The tubes are 

 usually rather oblique and in length may reach as much as 4 mm 

 although more often they are not more than 2 or 3 mm long. Their 

 mouths are more or less rounded or somewhat irregular and aver- 

 age 4 to 5 to a millimeter, The dissepiments are about as thick 

 as the diameter of the tubes, and are even and entire, There is no 

 sheen or silkiness to the hymenium. 



