We're not the only ones who love bats--turns out the Cuban rainforest vine Marcgravia evenia works pretty hard to get their attention, too. In a recently discovered (though not recently developed) evolution, M. evenia's leaves have a distinct concave shape that work like little satellite dishes. Why? To send back a strong signal when bombarded with echolocation from bats. That makes the flower uniquely recognizable to our flying mammal friends, who often rely on echolocation to make up for their poor eyesight.
The design isn't great for photosynthesis, but apparently the benefits outweigh the negatives.