304 



Mycologia 



Type collected on the under side of a log of Pseudotsuga 

 macrocarpa in the Upper San Antonio Canyon, San Antonio 

 Mountains, Southern California, 5,700 ft. elevation, December 

 15, 1918, /. M. Johnston 252. 



37. Poria salicina sp. nov. 



Effused for many centimeters, becoming continuous by conflu- 

 ence, inseparable, rather thick ; margin slight, appressed, fim- 

 briate, white, inconspicuous with age ; context a white membrane 

 as thin as writing-paper ; hymenium very uneven, white to cream- 

 colored, glistening ; tubes very thin-walled, somewhat collapsing 

 and friable, mostly angular, very irregular in size and shape, 2-3 

 mm. long, usually about 3, but sometimes only 1, to a mm., edges 

 becoming toothed or lacerate ; spores ellipsoid, smooth, hyaline, 

 4-5 x 2.5 ix. 



Type collected on a dead willow trunk at Fern Hollow, near 

 Pittsburgh, Pennsylvania, October 16, 1906, David R. Sumstine 

 25. Also collected by Mr. Sumstine on the same host at Kittan- 

 ning, Pennsylvania, September 8, 1907. 



38. Poria perextensa sp. nov. 



Covering the under side of a large log, practically continuous, 

 inseparable, thin; margin conspicuous, white, felty or cottony, 

 the extreme edge composed of appressed, radiating fibers, often 

 connected with mycelial cords ; context white, membranous, per- 

 sistent ; hymenium uneven, following the irregularities of the 

 substratum and developing in patches on the subiculum, at length 

 continuous and changing from white to ochroreucous and finally 

 isabelline ; tubes shallow and reticulate at first, maturing slowly, 

 becoming 1 mm. long, angular, thin-walled, unequal, pliable and 

 soft but not collapsing, 2-3 to a mm., edges entire to toothed or 

 lacerate; spores subglobose to broadly ovoid, smooth, hyaline, 

 3 ^ ^ng. 



Type collected on a much-decayed log of a deciduous tree at 

 " Boarstone Camp," north of Willimantic, Maine, September 

 12-14, 1905, W. A. Murrill 2520. This camp, situated on the 

 northern slope of Boarstone Mountain, was one of a number made 

 by Mr. Ricker and myself during our explorations in Maine. 



