BASIDIOMYCETES 397 



Thelephoraceae. Sporophore with a central stem, dimi- 

 diate, or resupinate ; hymenium smooth or with only very 

 slight traces of inequality of surface ; basidia tetra- 

 sporous. 



Stereum, Pers. Furnished with a central stem, sessile 

 and dimidiate, or entirely resupinate ; hymenium smooth, 

 even, originating from a compact, intermediate layer ; 

 basidia tetrasporous, hyaline, or tinted. 



Stereum hirsutum, Fries, Epicr., p. 549. Wholly 

 resupinate, or most frequently effuso-reflexed, the upper 

 portion projecting at right-angles from the matrix, and 

 often crisped or lobed ; pileus coarsely strigose, dingy 

 ochraceous, becoming pale and greyish, indistinctly zoned, 

 flesh thin, tough, and pliant ; hymenium even, glabrous, 

 naked, bright ochraceous, or pale tan colour j spores 

 elliptical, hyaline. 



Stereum frustulosum, Fries, Epicr., p. 552. Tuber- 

 culose, woody, crowded, and almost confluent, looking like 

 one much-cracked specimen, under surface and glabrous 

 margin brownish-black ; flesh distinctly stratose ; hymenium 

 convex, cinnamon, becoming pale, pruinose; spores ellip- 

 tical, ends subacute, 4-5X3-3*5 /*. 



Corticium, Fries. Hymenophore broadly effused, en- 

 tirely adnate to the substratum ; hymenium smooth, waxy, 

 consisting of basidia and paraphyses only which spring 

 directly from the mycelium without an intermediate com- 

 pact stratum ; spores continuous, hyaline. 



Corticium comedens, Fries, Epicr., p. 565 (1836-38). 

 Effused, inseparable, formed below the cortex and exposed 

 by the rupturing and recurving of the bark, dingy lilac. 



