CLASSIFICATION 419 



and cartilaginous and separable from the matrix when dry. Differs 

 in the shorter cystidia and smaller spores. 



On bark and wood of fir. 



2. Edge not free, often not well defined. 



P. limitata. — Irregularly circular in outline ; hymenium dingy 

 ochre, becoming pale, edge blackish. 



On bark and wood. 



P. rosea (PI. XXXII, fig. 5). — Broadly effused, thin, resembling 

 a coat of paint ; hymenium clear rose-pink, edge whitish. 



On wood and bark. Fading to a pale ochre when old and dry. 



P. incarnata.—Bvoa.d\y effused ; hymenium reddish or orange, 

 not becoming pale, edge byssoid. 



Differs from P. rosea in not becoming pale when dry. 



P. ochracea. — Broadly effused ; hymenium ochraceous, sparkling 

 with particles of oxalate of lime, margin radiating, cracked when dry. 



Closely resembling Coniophora olivacea, but distinguished by the 

 bristles projecting from the hymenium. 



On bark and wood. 



P. cinerea. — Commencing as small scattered patches, which soon 

 run into each other and form large irregular patches, brownish grey, 

 then greyish lilac. 



On bark and wood, more especially ash. 



P. velutina. — Broadly effused, margin running out into long, 

 branching strands ; hymenium cream-colour, distinctly but 

 minutely velvety. 



Hymenium often becoming tinged pink or buff. 



On wood and bark. 



P. phyllophila. — Thin, edge fibrillose, cream-colour. 



On dead leaves. Much resembling Corticiiim epiphyllnm, but 

 distinguished by the bristly hymenium. 



P. terrestris. — Very thin, indeterminate ; hjanenium pale grey 

 or buff, minutely velvety. 



Running over naked ground, twigs, leaves, etc. 



P. rimosa. — Broadly effused, inseparable, edge indeterminate ; 

 hymenium ochraceous, cracked when dry, minutely velvety. 



Very closely resembling cracked forms of Peniophora velutina, 

 from which it differs in the larger spores, which measure 15-17 X 

 6 /x ; whereas in P. velutina they measure about 10x5 /^- The 

 hymenium is usually cracked into numerous irregularly polygonal 

 portions. 



On bark and wood. 



P. scotica. — Broadly effused, margin fibrillose, radiating ; hy- 

 menium pale cinnamon, minutely velvety. 



Closely related to Peniophora velutina, differing in colour and in 

 the absence of the radiating marginal strands of mycelium. 

 Broadly effused over the inside of bark. 



