Mystery plant

Out weeding the flower beds recently, I stumbled upon a mystery plant in the middle of my hostas. I've been pulling up all kinds of odd weeds that I can't identify, so another mystery plant, in and of itself, is not that unusual. What is unusual is that this one bears an uncanny resemblance to something in the cucumber/pumpkin/melon family: broad-leafed vines complete with light orange blossoms. Odd thing is, I have not planted anything in the cucumber/pumpkin/melon family there or anywhere on my property. I'm granting it a reprieve from being weeded just so I can see what comes out at the end.