See if you can find some plants that have their seeds carried because some part of the plant is sticky. There are not a great many of them; still, if you look long enough, you will be sure to find some.
The twin flower.
WANDERERS THAT FLOAT.
Some kinds of plants live in the water or on the edge of it. These often have seeds or seed pods light enough to float. You can generally see little seeds floating about on ponds, if you take the trouble to look.
Cocoanut palms.
Into these ponds come ducks or herons or other waterfowl. The birds come to find something to eat, and as they swim or wade about they come in contact with the wet seeds that cling to them. After a time the birds, bearing the seeds on plumage, beak, or feet, fly to another pond or marsh, and as they alight the seeds are floated off.