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1) Seeds from plants like dandelions, swan plants and cottonwood trees are light and have feathery bristles and can be carried long distances by the wind. Some plants, like kauri and maple trees, have 'winged' seeds. ... With wind dispersal, the seeds are simply blown about and land in all kinds of places.
2) Seeds dispersed by water are contained in light and buoyant fruit, giving them the ability to float. Coconuts are well known for their ability to float on water to reach land where they can germinate. Similarly, willow and silver birches produce lightweight fruit that can float on water.
3) To attract the animals and birds and encourage them to act as seed carriers, plants often surround their seeds with a brightly-coloured and sweet-tasting pulp. In the deserts of North Africa, elephants eat the fruits that have fallen from the trees and deposit the seeds in their droppings several miles away.
4) When an animal or human touches the plant, it bursts open and sprays the seeds everywhere. If the ground is wet, the seeds can germinate right where they land; they can also stick to the creature that made the capsule burst open. This can help them be carried off to a new place.
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