122 FUNGUS-FLORA. 



substratum, wliitisli, pale ocliraceous or buff when dry; 

 spores subglobose, 5-6 /x. 



Corticium ladeum, Fries, Hym. Eur., p. C49 ; Mass., Mon. 

 Thel., p. 132. 



On wood. Broadly effused, often in very irregular patches ; 

 whitish, ochraceous, or pale buff Avhen drj- ; margin inde- 

 terminate, fibrillose, often radiating in long, thick, mycelial 

 strands in a frondose manner for several inches ; hymenium 

 when perfect smooth, cracked. Differs from C. radiatiim in 

 the cracked hymenium, and from C. radians in the subglobose 

 spores. Often imperfect and barren. 



Corticium confluens. Fr. 



Closely adnate, thin, margin radiating but not fibrillose ; 

 liymenium hyaline, whitish when dry ; spores cylindric- 

 ellipsoid, 20 x 10 fi. 



Corticium confluens, Fries, Hym. Eur., p. G55 ; Mass., Mon. 

 Thel., p. 133. 



On bark, usually beech. Often originating as isolated 

 rounded patches, which soon become confluent ; closely ad- 

 nate, thin. 



Corticium arachnoideum. Berk. 



Thin, effused, white or pallid, margin not determinate, 

 fibrillose or sulifloccose below, margin fimbriated with white 

 fibrils ; hymenium waxy, continuous, when dr}^ becoming 

 cracked ; spores globose, 6-7 fx diameter. 



Corticium arachioideum, Berk., Ann. Nat. Hist. xiii. (1844), 

 p. 345 ; Mass., Mon. Thel., p. 135. 



On wood, bark, running over moss, &c. Forming delicate, 

 effused, arachnoid patches of a snowy white ; threads by no 

 means forming fibres, but s})reading like a delicate web and 

 often remaining barren ; but mider favourable circumstances 

 giving rise to a smooth hymenium, consisting of elliptic 

 sporo])]i()res arranged in little bundles. Its habit is not 

 unlike that of Thehjyhora hombi/cina, 1>. (Berk.) 



The specimens on which Berkeley founded the species 

 were in the liypoclmoid condition, but afterwards numerous 

 well-developed sjiecimens were ctjllected, showing the hy- 

 menium continuous for several inches, pale ochraceous (when 

 dry) or often with a tinge of glaucous green, slightly cracked ; 

 margin shading off into radiating mycelium, cobweb-like or 



