Physical surroundings rather than latitude determine the character of the flora.
Even so small an area as that of Britain illustrates what has already been pointed out, that the species of a flora change both with latitude and altitude.
North of the North Atlantic maximum the waters become steadily fresher as latitude increases until the channels opening into the Arctic basin are reached.
But during the summer, temperatures are affected as much by altitude as by latitude, and the coast is cooled at night by breezes from the Gulf.
As a rule, the elevation of the timber line on the mountains increases as the latitude decreases.
And one essentially similar but adapted to slightly cooler conditions existed as far north as the latitude of Greenland.
The effect of this latitude is to give the company ample discretion in the matter, and to enable the act to be administered and the object of it to be attained without undue interference.
The lower levels are in climate and cultivation quite similar to the regions in the same latitude on the Malay peninsula.