9 
Sphagnales. 
reaction on the surface, hence the injurious effects of calcium 
carbonate may be due to the neutralising of the acidity ; that “ Hoch- 
moor ” forms contain more acid than those growing on “ Flach- 
moor” and that the former are more sensitive to lime; that on 
“ Hochmoor,” there is less mineral food available for the Sphagna 
Fig. 62. A, portion of a branch of 5. molluscutn, after removal of leaves ; 
B, transverse section of same ; C, portion of a branch of S. cymbifolium. 
in the sub-stratum, and that the amount of acidity and the 
sensitiveness to its neutralisation decrease as the amount of 
available mineral food increases; also that, in general, “Hoch¬ 
moor ” Sphagna absorb more water than “ Flachmoor ” Sphagna. 
