36 Postelsia 
Boykinia elata Trientalis europaea arctica 
Linnaea borealis 
These are most abundant where consider- 
able moisture is present in the soil. “The salal 
bushes along the edge are not as large and vig- 
orous as those farther back since along the bor- 
der of a formation or society are always to be 
found the less typically developed plants. In 
the middle region the salal assumes its character- 
teristic growth and size (Pl.V.) and the in- 
extricable tangle is here shown at its best. The 
stems which do not grow upright, branch freely 
in all directions and these intertwine in every 
conceivable way making passage through prac- 
tically impossible. The matted manner of 
growth which the plant assumes along the forest 
edge is partly due to the fact that in this position 
it is exposed to the full impact of the winds and 
subjected to sea influences. Where it is not so 
exposed it has a much more open growth as is 
characteristically shown in well protected places 
and where, as it enters the forest proper, it thins 
out gradually. In this dense growth a few 
plants which evidently are willing to accept the 
