March 1907] 



Mycological Bulletin No. 75 



309 



away, I dug down carefully and found to my surprise that the strands 

 which were very luxuriant here were attached to the rootlets of the 

 sugar maple. * * * 



"An ash, basswood and white oak were examined, but no trace of the 

 fungus found. About 27 dm. from the sugar maple, it was found that 

 some of the strands were apparently attached to a different root. Fol- 

 lowing this up to a clump of red oaks about 54 dm. away, I was again 

 surprised to find that the oak roots in this case were not conected with the 

 fungus at all, but that the root which was followed — which did not 

 have the appearance of an oak root — belonged to a large Celastrus scan- 

 dens which wound around one of the oaks. It was clear that we had an- 

 other symbiont connected with the fungus. * * * 



"Let it not be supposed that all Cortinarii are mycorhiza-formers, at 

 least normally. Cortitiarius arinillatits. for example, although very partial 

 to Tsiiga canadensis, is u,sually found among rotten logs or leaf-mold 

 near this tree, and is probably a saprophyte; on the other hand, it has 

 been found growing out of a cleft at the base of one of these hemlock 

 trees. It seems quite likely, however, that a good many Cortinarii are in 

 symbiotic connection in the manner of the one described in this paper. 

 During several seasons' observations, I have found C. sqiianiniiilosiis, C. 

 bolaris, and C. cinnahariuus again and again in places which would in- 

 dicate some relation to one kind of tree. C. cinnahariuus seems to prefer 

 the oak, the other two the beech. Noack has shown the connection of 

 Corfinarius callisteus with the beech. C. cacridcsccns with the beech, and 

 C. jiilniincus with the oak. Others will, no doubt, be added to the list 

 as soon as o])servers enter this interesting field." 



Fig. 2.S~. — CoR-Ti-NA'-Rirs rub'-ri-pes. (C. II. Kauft'ma-.i.) 



