Paul_Robinson wrote: This vine rather suddenly appeared, clearing the wall of ivy and philodendron that had been there for years. Along with its appearance the philodendron leaves changed from solid glossy green to variegated as shown at the left of the mystery vine leaves. Those vine leaves are palmate, heavily veined, and smooth edged. The large leaf grows
to 5 x 4". No idea where it came from. I sure hope someone can identify it.