I will be perfectly honest and say I have no idea which kind of bittersweet vine this is. I can't even remember seeing berries. I know it needs a shearing here and there to keep it looking neat .. I know it is AMAZING how much cooler it is under the arbor with this vine .. quite a few times I have stood under it to get a break from the sun and heat when I have been working in the garden. I have a clematis (just planted last Autumn) that is training up the other side for some flower interest .. a break from all the GREEN in other words .. anyone else with a bittersweet vine that can tell me which one this might be ?