of growing mycelium into living trees in the propagating houses 

 caused the death of infected branches and produced abundant 

 fruit in from four to six weeks. One or two of these young trees 

 appeared to be able to resist infection altogether, and a few of the 

 older trees in the Garden are apparently immune, at least when 

 in vigorous health. 



In its effect on the host, this fungus may be classed with the 

 most destructive parasites ; the parts attacked being so vital and 



