16 THE SCHOOL BOOK OF FORESTRY 



country. Pine and fir seeds are equipped with 

 wings like those of a bird or an airplane. They 

 enable the seeds to fly long distances on the wind 

 before they drop to the ground and are covered 

 with leaves. Maple seeds fly by means of double- 

 winged sails which carry them far afield before 

 they settle. Ash seeds have peculiar appendages 

 which act like a skate-sail in transporting them 

 to distant sections. Cottonwood seeds have 

 downy wings which aid their flight, while bass- 

 wood seeds are distributed over the country by 

 means of parachute-like wings. The pods of the 

 locust tree fall on the frozen ground or snow 

 crust and are blown long distances from their 

 source. On the other hand, oak, hickory, and 

 chestnut trees produce heavy seeds which gener- 

 ally remain where they fall. 



Squirrels are the most industrious foresters 

 in the animal world. Each year they bury great 

 quantities of tree seeds in hoards or caches hidden 

 away in hollow logs or in the moss and leaves of 

 the forest floor. Birds also scatter tree seed 

 here, there, and everywhere over the forests and 

 the surrounding country. Running streams and 

 rivers carry seeds uninjured for many miles 

 and finally deposit them in places where they 



