[Obtained from the US Dept. of Agriculture Nutrient List at http://www.nal.usda.gov/fnic/etext/000020.html ]
Spinach - at the top of the list, even when cooked (6.5 mg/cup); when raw .8 mg/cup; 1 leaf = .27 mg.
Dark leaf lettuce (approx. 2.2/serving)
Jerusalem artichokes, raw -- a remarkable vegetable root worthy of investigating (5.1 mg/cup; globe or French type are 2.1)
Dandelion greens, cooked (1.9 mg/cup)
Baked white potatoes skin (4 mg)
Brussels sprouts, cooked (1.9 mg/cup)
Peas, cooked (3.8 mg/cup)
Winter squash, cooked (1.4 mg/cup)
Baby lima beans, cooked (3.5 mg/cup)
Beets, cooked (1.3 mg/cup)
Pumpkin, canned (3.4 mg/cup)
Asparagus, cooked (1.3 mg/cup)
Tomatoes, stewed (3.4 mg/cup)
Kale, cooked (1.2 mg/cup)
Turnip greens, cooked (3.1 mg/cup)
Broccoli, cooked (1.1 mg/cup raw broccoli has .64 mg/cup)
Beet greens or chard, cooked (2.7 mg/cup)
[Raisins are approx. the same]
Parsely, 10 sprigs are .6 mg
Collard greens, cooked (2.2 mg/cup)
Tomatoes, raw (.49 mg/cup)
[One hard-boiled egg is only .6 mg]
Many other highly nutritious natural foods fall below this line, but that is why we should balance the compositions of foods in the menu to acquire adequate nutrients for health, building on the above list and thinking of complimentary foods also containing iron but perhaps richer in other minerals.
Using Iron-Rich Foods in a Delicious Way