In our house we disagree on the true nature of the potato. I say it does not really count as a vegetable (like kale or green beans). This map helps show why I think potatoes shouldn't be considered a true vegetable. Dark brown areas are where green leafy vegetables cost $1.64-1.86 compared to $1.00 for starchy vegetables. Notice that Maine and Idaho, two states with high potato industries, still have high ratios.
|Map from Food environment atlas|