GROWTH 307 
for, as we shall see, in growing cells and members there is 
a constant stretching of the cell or tissue by hydrostatic 
pressure or turgidity, which can be distinguished from 
growth by the fact that it can be removed, the result 
being a certain diminution of the size of the part under 
consideration, 
Fic. 185.—Portion oF SECTION or STEM oF RuSH, SHOWING STELLATE 
TIssUE OF THE PITH, WITH LARGE INTERCELLULAR SPACES. 
Growth in the lowliest plants may be co-extensive with 
the plant-body. In all plants of any considerable size 
however it is localised in particular regions, and in them 
it is associated with the formation of new protoplasts. We 
have already mentioned that in the sporophytes of all 
the higher plants there exist certain regions in which 
