Our first wisteria vine was already well established when we bought our home nearly 20 years ago. It never flowered until two years ago when we got one cluster of flowers.
This summer we saw a few flower clusters.
Today, unexpectedly, I saw what appeared to be a pod. So I looked it up. Sure enough, the wisteria produces seeds in a pod, which explodes to disperse the seed. Considering the way it spreads, you'd think it wouldn't bother with seeds.
Anyway, here's a picture of our pod: