You’d think I might have recognized it, my maternal grandmother had one, different color but that’s what it was. They lived in rural NE Kansas and they had an outhouse they hadn’t tore down after city sewers came to Netawaka and a very similar vine decided to make it home. Paul
They're some kind of vine, Paul. I'll try looking them up to find the name. They're on a trellis between flowerpots over our front walk (image in pending) that makes people over six feet tall duck while they appreciate.