21 - 
ditions than the maple and hemlock* 
omm SPiiCIKS OF TRKi$8 III TKK IDmOCK: FOREST. - Several 
other tree species occur, hut they are of less Importance eco¬ 
logically than those mentioned. One of those of occasional occur¬ 
rence is basswood ( Tili a amo r lean a L«). It gets to be a large tree, 
with a clear hole nearly up to the forest crown. Seedlings were 
frequently found, having a distinctly prostrate habit, the leaves 
becoming very large in the shade. (Thuja occidental is L. (arbor 
vitas) occurs in low spots but is not a tree of general die- 
% 
tribution. As a forest tree it often becomes very large. Its 
presence along the shore line will be discussed litter. Pinus 
St rob us L. (white pine) is occasionally found as a very large 
tree, towering above the rest of the forest. My observations 
seamed to indicate that where one was found, several others were 
likely to occur in the some neighborhood. Abies balSamoa (L.) 
Mill, (balsam) is not common. It is rarely found as a mature 
tree in the hemlock forest, though seedlings are often frequent 
in windfall openings, and occasionally colonies of young trees 
are found in like situations. Whether this species will mature 
in competition with others evidently depends on the size of the 
forest opening; in most cases it is suppressed by the more shade- 
tclerant trees, \7hen it occurs as a mature tree in the forest, 
it is safe to infer that the opening was well lighted for a 
considerable length of time. Its beha\ r ior in this respect bears 
