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L O
accompanied by willow
the species become smaller and of slower g
brushwood alone remains
division into zo nes
Tropical fo
tropical forest zone
Temperate warm zone of deciduous broad
the warmer half
Temperate cool zone
or
Cold zone to the l
h ese zones can be met
ach of t
on rising in mountains
peaking generally
ecreases from sout
woods prevail in
pure woods commence
r y
ve
pecies t
is its own
it fall s
zone whether produced by latitude or elevation
good as regard s shape of stem
quality of timber
The suitability of exotic trees d epends on their finding in
the new locality condition s which coincide with tho se of their
natural home
a te near their natural
r
a nger from frost
d
a successful introduction of the species
Coming now to the relative heat requirements of the several
species here under consider
suggested
a k
o
beech
IT Y
AL
alder and popla
r est zone
which he calls the
mit of forest
the number of genera and species
h to north
r opics and sub
t
and they prevail in the
h rives best in the centre of the zone which
toward s the upper and lo wer limit of
h e r words
in ot
and especially late frost in spring
Common elm
essile oak
T V
FO R
M ayr suggests the following
evergreen oaks
the cooler half
and larche s
either on going no
h e con sequence is that mixed
T
tropics in t
r oduction of volume
p
that the loc
h is is not t h e case
If t
a tion
the following scale is
sweet chestnut
ustrian pine
lime
cotch pine
T A TI ON
r
r t h er north
u
r o wth
P
laurel s etc
a ved tr
le
h e
T hi s hold s
a lity comes at any
is ag
pedunculate
silver fir
ouglas fir
until
es
or
r t h or
and
the
a inst
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