Great question! According to my Nutrition Advisor book, potato is the highest at 220 for a 7 oz. serving (sweet potatoes are almost half. Yams are only 79 per 1/2 c) ), corn follows at 83 for an average ear. Parsnips come in at 63 for 1/2 c. The other highest are pumpkins, winter squashes Jerusalem artichoke, and artichoke hearts. Beets, carrots, aspargus, tomato, Brussels sprouts, rutabaga, summer squash,broccoli, and spinach are between 18 and 30 per 1/2 c. Most greens, cabbages, peppers, radishes and celery are under 15 per 1/2 c.