GOOSEBERRY POLYPORUS 185 



present in the burrows of mice or other animals suggested 

 the idea to Hartig that the spores might be carried by the 

 fur of animals mice, etc. from one locality to another, 

 and thus spread the disease. Brefeld has shown that a 

 conidial form of reproduction is also possessed by this 

 fungus, which may be a further means of diffusing the 

 fungus. 



Hartig, Zersetzungserscheinungen des ffolzes, p. 14, pi. i.-iv. 

 Marshall Ward, Timber and some of its Diseases, p. 142. 

 Brefeld, Unters. aus dem Gessamtgeb. der Mykol.^ vol. viii. 

 (called Heterobasidion annosum}. 



GOOSEBERRY POLYPORUS 



(Fomes ribis, Fries.) 



A parasite not uncommon on the stems of old gooseberry 

 and currant bushes, growing in an imbricated manner; 

 that is, several specimens growing above each other on 

 the stem of the host. 



The pileus is woody, thin, and horizontal, upper surface 

 yellowish-brown, minutely velvety when young, becoming 

 almost bald with age, usually with concentric zones. Pores 

 very short, hymenium brownish-grey; flesh thin, rather 

 soft, rusty brown. 



PREVENTIVE MEANS. The fungus is perennial, and only, 

 as a rule, grows on old plants, which from every point of 

 view should be replaced by young trees. 



TINDER FUNGUS 



( Fomes fomentarius , Fries.) 



This fungus is a very destructive wound-parasite, attack- 

 ing the beech (Fagus sylvaticd) more especially, although 



