I'm not exactly sure how this is a flower, but this is what the root beer plant does during the summer. I've never seen any seeds - it actually spreads fairly easily by way of underground stolons, or horizontal roots.
I'm not really sure how many different types of day lilies I have, but here's another one.
I thought I had posted a photo of my backyard sunflowers, but it doesn't look like it. Here's a shot of it, almost fully open, with bees pollinating it.