They are not edible. -The pods are full of seeds with fluffy, downy parachutes, similar to the seeds of milkweeds, to which it is related. Here's a pic of a pod releasing its seeds.

To be precise, it's Canna. Here is a link that might be useful: Google image results

Gulp. I'm eating my words. Of course there had to be more to the plant so I went back to the original photo and it appears to show three lance-shaped leaves arrayed in a whorl below the third capsule. I will post a new photo showing that---although it is difficult to see because there is a big blurry grass blade right in front of it. I definitely think we're in the right neighborhood, something in the lily family, but I'm no botonist. --Yogum

Thought I'd post an update. You see, I planted those seeds last month--and they're growing! They're about 2-3" tall right now, and they're still in the small container I started them in. I'm going to let them get a little bigger and then I'll move them, either to some big planters on my patio or directly in the ground.