Apparently muscadine have male and female vines, and not seeing grapes isn't surprising for this vine.
I dig them out with a mattock when the soil is moist.
They root along the stem everywhere that it touches ground... and produce enough weight to rip tops out of mature oaks... so have the potential to cause a good bit of damage.... But they can be killed by mechanical means... which is more than I can say about chinese wisteria... A far worse problem!
