6 _Scientifie Proceedings, Royal Dublin Society. 
some seem to become weakened along a spiral line (as in Plate 11.) 
apparently corresponding to the course of intrusive hyphe. 
The hyphe outside the rhizome can be traced inside the hairs; 
Fic. 5. 
Cells from the mediocortex, showing hyphe in various stages of absorption, and 
starch grains making their appearance. 
passing down, singly and spirally, or in bundles, to the cortical 
tissues of the rhizome (Plate m1.).? 
1It seems evident, therefore, that these hairs are specialised structures for the 
attraction and capture of the mycorhiza, and if a special name is needed they might 
be termed ‘‘ mykokleptic”’ hairs. 
