Thanks everybody! The fruits seem to be four-sided. I don't know how long they've been hanging there, but I'd guess it's been a LONG while. I zoomed in on a pic I took on house inspection day in late December and the tree is definitely on the way out in that shot.
I picked one of the smaller, curvy ones and sliced it open. Seems to be a pretty healthy seed pod down the center, but maybe that's just because its so green. I'm going to leave the bunch hanging on the back patio and see what I end up with!
