Clubmoss plants produce spores that are superhydrophobic, meaning they will not mix with water. When you drop water on top of a whole bunch of these spores, the water will form tiny water droplets on top of the spore powder instead of being absorbed by it. You can see an example of this in this video. The spore powder is also known as lycopodium powder and is used in fire shows and magic tricks.
To my knowledge clubmoss is the only plantspecies that produces superhydrophobic spores. This made me wonder what the reproductive or evolutionary advantage of a superhydrophobic seed or spore could be.
I personally think the superhydrophobic layer could protect the spores from being digested when the clubmoss plant is eaten by a herbivore. The superhydrophobic layer could also prevent the spores from sinking when they fall into water like a river, instead they would stick to the surface. A river could help disperse the spores accross a larger area pretty easily. Eventually the spores would drift to the shore again where they could settle and become new clubmoss plants.
What do you think the reproductive advantage could be?