Looks like a sweet potato.

If you planted it... perfectly normal.
If it's wild... maybe don't eat it.

ipomoea pandurata is a common wildflower in these parts, and I enjoy the flowers...
While some sites claim edibility, other sites say not...
http://www.pfaf.org/user/Plant...

I can't see the leaves in your photo but my first thought also was possibly Man of the earth (Ipomoea pandurata)

Some said it's possible Jimson Weed... I'm not sure, tho. I found it growing out in the country where my Papa grew up.

plantladylin said:I can't see the leaves in your photo but my first thought also was possibly Man of the earth (Ipomoea pandurata)

I hope you can see the leaves better in this one. I reached up to touch one of the flowers to see if it was sturdy or delicate, when I grabbed it, the top tore off. They were almost blooming out and wilting as I stood there.

I would tend to agree it is a Jimson weed.