I came across this plant in the woods (Middle Tennessee) that was covered with bees. I was quite amazed since bees have been so scarce everywhere (at our garden I've only seen a handful all summer). So I tried to identify the plant and the closest I could come is honeyvine milkweed: it has the heartshaped leaves and is about ten feet tall. However, the flowers on this vine occur in panicles about six to eight inches long, not in the small knots shown in the pictures of honeyvine. Can anyone help me identify this vine?