Ah! I didn't see the fold-out charts, which don't display properly on my browser. I did a ctrl-f search for mushrooms but got no results because they don't show if you haven't clicked on the "+" markers.

And yeah, I meant tomatoes, bell peppers, olives, cucumbers... there aren't many that go the other way, but the casual classification seems to be based on sweetness rather than any other nutritional concerns.

I'm twitchy about any nutrition site that has a page called "All about the vegetable group" that doesn't tell you how it's deciding what a vegetable is. They've got no criteria for helping people decide what a fruit/vegetable not on the list falls under. (Lychee: Probably fruit. Jujube: Not certain; they're sweet-ish but no more so than cucumbers. Fruit-ish, though. Bamboo shoots: Probably vegetable; starchy? Or other? Mung bean sprouts: Vegetables? Or in the separate category that beans go in?)

It's not that I think the page/system is founded on bad science, it's that whatever science it's using is opaque to the reader.