POLYPORACE^E 
95 
Forming patches (2-4 in. diam.) on dead wood; white at 
first, and then ochreous-ivory. Bristles minute, hyaline. 
Occurring throughout the year. Uncommon. Sometimes 
bearing a superficial resemblance to Grandinia granulosa. 
MUCRONELLA 
(Diminutive of macro , a sharp point—from its appearance) 
M. calva ( calva , the bald scalp—from the habit, a few 
scattered hairs). 
A curious fungus consisting of very slender whitish or 
grey smooth spines, -|-i in. long, growing in a downward direc¬ 
tion on rotten pine wood. There is no resupinate portion; 
the thin film which is present at first soon becomes obsolete. 
POLYPORACEiS 
(Pore-bearing Fungi) 
KEY TO THE GENERA 
Merulius. 
Dsedalea. 
Trametes. 
Poria. 
Polystictus. 
Fomes. 
Polyporus. 
Fistulina. 
Strobilomyces. 
Boletus. 
Sporophore subgelatinous. Tubes very shallow, re¬ 
sembling anastomosing wrinkles. 
Sporophore corky. Tubes very sinuous and labyrinthi- 
form. Pores sinuous. 
Sporophore coriaceous. Tubes appearing as if im¬ 
mersed in the flesh of the pileus. Pores oval or 
elongate. 
Sporophore entirely resupinate, disclosing only tubes. 
Sporophore coriaceous or membranaceous, sessile. 
Tubes shallow and punctiform. Pores round. 
Sporophore coriaceous or woody, sessile. Tubes 
formed in successive strata. 
Sporophore fleshy or tough, with or without a stem 
Tubes not formed in successive strata. 
Sporophore fleshy, juicy, with lateral stem. Tubes 
quite separate from each other. 
Sporophore fleshy, with a central stem. Pileus 
covered with large scales. 
Sporophore fleshy, mushroom-like in shape. Tubes 
easily separable from the hymenophore. 
