22 



Mycologia 



to 14 by 6 to 8 by 0.4 cm. The surface in young specimens is velvety or 

 tomentose, later becoming slightly incrusted, but always more or less corky, 

 zonate, much wrinkled and furrowed in old age, in color deep brown, be- 

 coming darker ; margin lighter colored, undulate, tomentose, thin, with narrow 

 sterile border when young, later becoming thickened, rounded, and recurved 

 by the successive annual layers ; context corky to woody, thick deep brown ; 

 tubes irregularly but distinctly stratified 2 to 3 mm. long each season, but 

 much longer in resupinate forms, brown ; mouths uniformly oval, varying in 

 size, 4 to 8 to a millimeter, edges thick, ferruginous ; spores colored, globose, 

 smooth, 7 to 8 (i; spines dark brown, slightly ventricose 13 to 25 by 6 fx." 



rtgidus. Polyporus rigidus Lev. Ann. Sci. Nat. III. 2 : 189. 

 1844. It is claimed that this Javan species, which somewhat 

 resembles Rigidoporus surinamensis, occurs in Missouri and 

 Florida. I have not seen the American collections upon which 

 this claim is based. 



sensibilis. See Spongipellis sensibilis Murrill in Western Poly- 

 pores, p. 10. Closely related to Spongipellis fragilis (Fries) 

 Murrill. 



setosus. Trametes setosus Weir, Jour. Agric. Research 2: 164. 

 pi. 10. 1914. Described from Idaho on Pinus monticola, and 

 said to be destructive to coniferous wood in the Northwest 

 from Vancouver, B. C, to Montana. Compare small, poroid 

 forms of Porodaedalea Pini (Thore) Murrill. 



" Sporophores pileate or entirely resupinate, depending upon its position 

 in the substratum. The resupinate forms have sharply defined sterile margins 

 and are usually found on the underside of logs, where they may extend for a 

 distance of a foot or more. The distinctly sessile pileate forms are usually 

 free from each other, but may be connected by the resupinate portion, occa- 

 sionally narrowed at the point of attachment, mostly thickened at the base, 

 rarely applanate or conchate, averaging 1 by 2 by 2 cm. Surface minutely 

 tomentose, becoming smooth or weathered in old specimens, zonate, rich dark 

 brown, uneven ; margin thick, of lighter color, entire, becoming slightly serrate 

 in old age, slightly sterile ; context ferruginous or fulvous, spongy to corky, 

 slightly zonate, particularly in old specimens ; tubes long, often filled with -a 

 grayish mycelium, 1 to 1.5 mm.; mouths small, mostly angular, occasionally 

 labyrinth-like, 3 to 6 to a millimeter, edges thick, tomentose ; spores hyaline, 

 4 to 5 by 3 fx. The character that distinguishes the species from all of its 

 near relatives is the immense number of long dense brown setae lining the 

 interior of the tubes. In no other species known to the writer is this char- 

 acter so distinctly pronounced. The longest spines measure 41.45 the 

 shortest about 22.16 fi, with an average of 30.46^. The nature and immense 

 number of these setae may be determined by a study of Plate X, figure II." 



