ON ENVIRONMENT 
them so completely that the reddish color of the 
plant, imparted to the snow, first gave rise to the 
tales of far northern travelers as to the color of the 
snowfall and explained the apparent phenomenon 
of red snow. 
Another division of this family, going to the 
opposite extreme, thrives in the waters of Arrow- 
head Sulphur Springs in California—lives its life 
and reproduces itself in water so hot that eggs may 
be easily cooked in it. 
Contrasted with these microscopic members, 
one thriving on the Arctic snows, the other in water 
at the boiling point, there is still another member 
of this family which has become the largest plant 
in the world. This, the gigantic seaweed of the 
Sargasso Sea, is taller and larger than the greatest 
giant redwood which California has produced. 
And so on; some of this family of the algae 
grow on and in animals, some on other plants, 
some on iron, some on dry rocks, some in fresh 
water, and some in the salt seas. 
The monkey-puzzle tree, a form of which is 
illustrated by a direct color photograph print, 
shows an adaptability to environment as striking 
as that of the cactus—although for an entirely 
different purpose. 
At the top of the monkey-puzzle tree, so called, 
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