Thoughts?

I don't know how long, but I'm sure it has been quite a while since I showed pictures of my yard.  But no worries.  The yard has not gone to wreck and ruin.  My method of gardening is mainly benign neglect.  I have some professional gardening done by some truly lovely people who hate power tools and plush lawns and square bushes as much as I do.  They may think I'm a little nuts about the bugs and birds, but at very least they act like they understand me.  I spend a little time myself puttering around the yard, trimming and pulling.  But mainly, I just water a little and neglect.  Since I love wilderness even more than gardens, it seems the best way to go.  Not to mention, it's kind of effortless.  Plants just show up in the yard, carried by birds or the breeze.  Sometimes they turn into wonderful things.  In this way, I've acquired a fig tree, two oaks, several sunflowers, tomatoes, night-blooming jasmine, and all manner of grasses.  And just recently, this.

A couple of  people and I made a bet on what we thought it was.  I said a melon.  They said, respectively, a sycamore tree and a passion vine.  I'm fairly certain they are wrong and  I'm right, but I'm interested in other ideas.  There may be a prize for the correct answer - possibly some of the bounty of the plant, whenever and whatever that may be.
Here's another nice thing that happens in my yard.