I have this plant, and I can't figure out what it's called. It's never produced flowers. When the plant is older (like the one where I took some cuttings to make mine) it is more purple colored. The leaves are kind of fuzzy. This just grows and grows, pretty fast too. It's easy to clip the end of one of the vines and stick it into the soil, and the vine continues to grow. It grows from the ends. Any clue?