If anyone is interested.....I spent some more time googling and finally
tracked down the name of the weedy vine that has been plaguing me. It's
Polygonum perfoliatum, mile-a-minute vine, also known as Devil's tail
tearthumb; both common names give a pretty fair description of what it's
like.

It was originally introduced into this country in the 1930's with a shipment
of rhododendrons into a nursery in York County, PA, and has spread from
there. Since I am in the next county over, it's no wonder I see it around
everywhere.

There's a good article on it he
http://www.nps.gov/plants/alien/fact/pope1.htm

Cheers,
Sue

--

Zone 6, South-central PA