Jennines & Hanna—Corallorhiza innata R. Br. a 
The hyphee in the soil outside the plant and those inside 
the hairs and cortical tissues are similar and continuous, and have 
the structure shown in fig. 2. 
Thomas' observed the presence of the papilla over the surface 
of the rhizome and also the presence of hairs. He failed, how- 
ever, to demonstrate the connexion between the hairs and the 
mycelium in the surrounding soil, considering that the probable 
function of the former was the purely mechanical one of anchoring 
the plant to any substance with which it might happen to come 
into contact, a purpose for which they are evidently inadequate. 
The axis of the aerial shoot which arises from the rhizome 
grows by means of a stratified apical growing point, on the sides 
of which scale leaves arise in acropetal succession, covering up the 
growing point (fig. 1). 
Figs. 6 and 7. 
Cells from the mediocortex, showing hyphe in various stages of absorption, and 
starch grains making their appearance. 
Taking sections through the rhizome the following structure is 
noted :— 
1. Outer layers.—There is a definite superficial layer of cells, 
elongated longitudinally ; and at irregular intervals, where sections 
of papillz are to be seen, the hairs arise as outgrowths at right 
angles to the surface (Plate m.). On the outer wall of the super- 
ficial layer of cells there is a thin cuticle; below it two or three 
layers of thin parenchymatous, isodiametric cells with small inter- 
cellular spaces occur (fig. 8). These cells have large nuclei and 
protoplasmic contents and small starch grains; the nuclei are 
1 Loe. cit. sup. 
