96 THE HUMAN SIDE OF PLANTS 
cargo and passenger seeds to new shipping points. 
Here, if the new cargo demands clean cars, the dirt 
is swept out, and the seeds find new homes in lands 
probably hundreds of miles from their original 
starting place. Those that travel on boats usually 
are wind-blown seeds that cling to the clothing or 
baggage of passengers, or stow themselves away in 
miscellaneous corners of the cargo. 
So these many unpopular plant-children do not 
sulk in a garden corner because they cannot walk, 
nor fly, nor climb, nor jump; their always-wise 
Mother Nature has fitted them to take much longer 
journeys in their own peculiar way of catching hold 
of and riding on animals. 
