[Tilted Irish Kilt]

Vegetable families , and crop rotation
Best chart and worthy of printing out:
http://www.organicsforall.org/vegetables.htm FAMILY VEGETABLES in FAMILY
Amaryllidaceae: chives, garlic, leeks, onion
Brassicaceae: horseradish, mustard, broccoli, Brussels sprouts, cabbage, collards, cauliflower, kale, kohlrabi, radish, watercress
Chenopodiaceae: beet, Swiss chard, spinach
Compositae :endive, escarole, cardoon, artichoke, sunflower, lettuce, salsify
Cucurbitaceae: gourd, melon, squash, cucumber, luffa
Gramineae: corn
Solanaceae :tomato, pepper, eggplant, potato, tomatillo
Umbelliferae: celery, carrot, dill, chervil, cilantro, parsley, fennel, parsnip
Convolvulaceae (sweet potato),
Labiateae (basil),
Malvaceae (okra),
and Polygonaceae (rhubarb, sorrel).

[greeneyes]

Good list. Mine is more simple: leaves, fruits(includes solanese) roots, and legumes.

Leaves are stuff that like high nitrogen like spinach and lettuce. Fruits are basically fruits and veggies, solanese as you noted, roots like turnips, garlic etc, and legumes are peas, beans etc.