This vining plant is growing in the shade against the north side of our house foundation. Began blooming recently, and I thought perhaps it was climbing hempweed. But photos of Mikania scandens show a smooth margined leaf. Wondering if this is a pest plant, either Mikania micrantha or Mikania cordata ?
this looks like a typical Mikania scandens to me. The leaf margins can be entire or ‘repand’ which is what yours show. You will see other pictures of this species on the internet that match yours.
Dr, Steven Hill, Botanist, SCNPS