|Here's another opinion:
Isn't the goal of TN to learn more about nature through photography? I think the final say in approving photos for TN shouldn't be whether or not the subject is of a cultivated variety--but whether or not it TEACHES us something.
Believe it or not, I've never seen or heard of a dewy lemon before. I'd love to see one! I love looking at any aspect of nature up close (if you don't believe me just check out my gallery) because you can learn so much about your subject--textures, colors, light, and if your imagination is really wild, even sounds! I'd also love to see a picture of a papaya, as long as it isn't a papaya on the stand in the grocery store.
The goal here, as TN states, is to LEARN ABOUT NATURE, PERIOD. And because we're all from different corners of the world, who's to say that a picture of a strawberry won't teach somebody in South Africa something about native North American fruits?
Let's STOP reporting photos of lemons, papayas, roses... if you don't like the picture that you see, don't forget you have a "back" button on your browser.