There are two seeds that can float that I know of. And they are: Poppy Seeds and Sunflower Seeds.
Dicotyledons are groups of flowering plants whose seed has two embryonic leaves. Examples of dicotyledon seeds are oaks, beans, legumes, apples and olives.
A plant, such as a cycad or conifer, whose seeds are not enclosed within an ovary.
Abelmosk (also abelmusk) is an evergreen shrub of the West and East Indies, whose seeds are used in perfumery and coffee-making.
Musterd is a plant whose seeds and leaves are useful to us
Poppy seeds fly away
Mention a plant whose and seeds are used as food
you kiss a flower
A zoochore is a plant whose seeds, spores or fruit are dispersed by animals.