HONEY FUNGUS. 



429 



invited to the works of B. Hartig,* on which these notes 

 are chiefly founded. 



It is best for the purpose of Forest Protection to distinguish 

 fungi attacking coniferous trees from those attacking broad- 

 leaved trees, and within each group according to the organ 

 attacked (roots, stem, branches, needles or leaves, or fruits). 



A. Boot-fungi. 



*1. Armillarea mellea, Vahl. 



a. Description and Mode of Attack. 



The honey fungus, formerly named Agaricus melleus, L., 

 which is one of the commonest in the British Isles, causes a 



a Root of a Scots pine killed by A 

 mellea, Vahl. a Rhizomorph, exter 

 nal to root, which it bores at a. 



b Flattened rhizomorph passing between 

 the dead wood and bast of a, Scots 

 pine ; its left-hand branches are white, 

 and resemble ordinary mycelia. 

 Fig. 207. 



well-known disease in conifers. The symptoms are : Yellow 

 colour in the needles, which gradually dry up, and fall ; the 

 shoots wilt ; the base of the stem swells up, and the bark peels 

 off, whilst turpentine exudes freely, clogging together the soil 

 around the tree ; the bark decays, and fibrous fungoid tissues 



* " The Diseases of Forest Trees," fl. Hartig. Translated by Somerville and 

 Marshall Ward. Macmillan & Co., London, 1894. 



