THE LARCH IN GERMAN FORESTS. 55 



ness ; he does not, however, regard Peziza Willkomviii as of 

 much consequence, so far as the Japanese larch is concerned. 

 The unhealthy stage at which the European larch remains so long 

 and so persistently, is probably not reserved for Lcvrix leptolepis, 

 which, in consequence of its great light-requirement, cleans its 

 stem quickly when once it has commenced to do so, and it will 

 most likely die quickly. In its case, the fungus will probably 

 exist as a saprophyte. 



Since, in Germany, the Siberian larch becomes green before the 

 European species, and this again commences its seasonal vegeta- 

 tion before the Japanese species, it is clear that the first-named 

 comes from a colder, and the last-named from a warmer climate 

 than that of Germany. The German fir and pine zone is conse- 

 quently out of the question for Larix leptolepis, and the author 

 considers even the oak and beech region too cool, if the sun's rays 

 are there intercepted from the tree by a surrounding crop. He 

 suggests experiments with Larix sibirica and L. occidentalis, 

 whose home is in countries where the climatic conditions more 

 nearly approach those of Germany than do the climatic con- 

 ditions of Japan. 



