456 



BASIDIOMYCETES. 



numerous branches like the runners of some hanging plant, >.//. 

 Aaron's Beard (>sW./'//'/v///c/ sarmentosci). The rhizomorphs live as 

 saprophytes and have been long known to emit phosphorescent 

 light. Sporophores are developed directly on them, and if one 

 sows the spores, a delicate hyphal tissue is produced, which, 

 under suitable conditions, passes gradually over into the rhizo- 

 morph-straud. Brefeld succeeded in raising rhizomorphs from 

 spores in artificial nutritive media. 



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Fio. 285. Af/ariciix mcllcux near a Beech-stool, (v. Tubeuf phot.) 



The ^^a?"icws-mycelium forms fan-shaped snowy-white firm 

 membranous expansions under the bark of newly killed or still 

 living trees. They are quite distinct from the much more delicate 

 mycelial expansions of Polyponis annosits, and offer a particularly 

 easy means of distinguishing between the two species. Another 

 indication of Aiii-ienx is the "reat outflow of resin from the bark 



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at the base of the stem and from roots, whereby hard clumps of 

 earth are formed round the roots. The passage of the rhizomorphs 

 into the white membranous mycelium is easily observed. The 



