Summary: " Samara." That's what they're called: samara. And of course, they're "a winged achene, a type of fruit in which a flattened wing of fibrous, papery tissue develops from the ovary wall. A samara is a simple dry fruit and indehiscent (not opening along a seam). The shape of a samara enables the wind to carry the seed farther away than regular seeds from the parent tree, and is thus a form of anemochory." And the Wikipedia entry goes on to say " A samara is sometimes called a key and is often
