212 BOTANICAL GAZETTE [SEPTEMBER, 
An ash, basswood, and white oak were examined, but. no trace of 
the fungus found. About 272™ from the sugar maple, it was found 
that some of the strands were apparently attached to a different 
root. Following this up to a clump of red oaks about 54°™ away, 
I was again surprised to find that the oak roots in this case were not 
connected 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 scandens which wound around one of the oaks. . It 
was clear that we had another symbiont connected with the fungus. 
DISCUSSION 
It may be well here to call attention to the following points which 
have been brought out: (a) that Cortinarius rubipes (for so we will 
call it) is connected with three forest symbionts belonging to different 
families; (6) that it is apparently selective in the sense that the 
specific character of the symbiont does not necessarily attract It; 
(c) that one of the symbionts is a maple. ie 
Noack (12), who has been the only investigator of the agarics 
as producers of mycorhiza, thinks he has connected Tricholoma 
terreum with both beech and fir, and Lactarius piperatus with beech 
and oak. My own observations seem to show that it is undoubtedly 
a fact that one fungus may be attached to trees of very different 
families. In the case of Celastrus scandens no fruit bodies were 
seen, but there can hardly be a doubt that it was the mycelium of 
the same species. 
It is rather unexpected to find that the same tree species a 
exposed to the fungus does not always become associated with it. 
It is evident that the mycorhizal fungus may attach itself to ey 
different hosts, dependent for its initial attachment on certain env 
ronmental factors. : 
The maples of Europe are reported as seldom forming mycorhiza 
(2). The roots of the sugar maple mentioned above were carefully 
examined with a lens, and also under the microscope, and mycor ie 
seemed to be everywhere abundant on the smaller rootlets. How 
generally they occur on our maples is not known, as hardly any work 
has been done in this line in our country. 
With regard to the kind of mycorhiza involved, there is of coufs® 
