  Several species of plants have raindrop-sized flowers that catch raindrops
opportunistically in order to spread their 0.3-mm seeds distances of over 1 m.
In the following fluid dynamics video, we show examples of these plants and
some of the high speed videography used to visualize the splash dynamics
responsible for raindrop-driven seed dispersal. Experiments were conducted on
shape mimics of the plants' fruit bodies, fabricated using a 3D printer.
Particular attention was paid to optimizing flower geometries and drop impact
parameters to propel seeds the farthest distance. We find off-center impacts
are the most effective for dispersing seeds. Such impacts amplify the
raindrop's speed, encapsulate seeds within drops, and direct the seed
trajectory at angles optimal for long-distance dispersal.
