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, 



[29] 



