WATER TRANSPORTATION OF PLANTS. 
29 
land as far north as Clinton County, Michigan. The 
stout, hard pods are three to four inches long, one and 
one-quarter to one and one-half inches wide, and one-half 
inch thick. The very hard seeds are surrounded with 
sweet pulp, which most likely made it an inducement 
for some of our native animals to devour them and 
thus transport the undigested seeds to remote localities. 
The pods often remain on the trees all winter, and when 
dry, will float on the water of overflowed streams without 
any injury resulting to the hard seeds. By themselves the 
seeds sink at once. 
