POLYPORUS. 



437 



and hose. The privilege of collecting the tinder-fungi was 

 rented out and regarded as a source of forest-revenue, while the 

 tinder-industry was formerly an important one in many districts, 

 where sporophores were more frequent and larger than now. 



Measures against this fungus have already been considered 

 in our General Part (§ 12). 



Fig. 266. — Polyporus fotnentarius on living Beech, a, A furrow extending 

 above and below the inser1;ion of the sporophore. &, An injury; produced by 

 tearing of the wood in felling, (v. Tubeuf phot.) 



Polyporus sulphureus (BuU.)^ (Britain and U.S. America). 

 The sporophores are flat and soft, the upper side being bright 

 orange-red and the lower sulphur-yellow. They last only for 

 one year, hence are small; they frequently occur in masses, 

 one above another in tiers. After death they lose colour, 

 become brittle, and are easily detached. According to De 



iR. Hartig, 

 (Edit.) 



Zersetzungserscheinungen. A very common species in Britain. 



