Looks that way - but I thought the veins would be purple? I guess you'll know as it ages. Either way I love a good volunteer!

Barbie~

Morningloree, there is also a thornless variety of solanum quitoense.
Here it is in a nice display....

Silvia

Here is a link that might be useful: naranjilla

I wish the thornless variety had volunteered, even the undersides of the leaves have thorns and thorns are growing along the ribs on the top. Naturally, being curious I had to touch it, Bed of Nails is a good name, I got stuck pretty good. I don't have much hope because it doesn't grow here readily.

It's not naranjilla; it's tropical soda apple- get it out before it gets everywhere