The plants in these families are mostly self-pollinating. The flowers have male and female parts, so pollination occurs within the individual plant, not as a cross between plants. Seeds are reliably the same as the parent plant.
Aster, Daisy, or Sunflower Family (Asteraceae)
artichoke, cardoon, endive, Jerusalem artichoke, lettuce, salsify, shungiku, sunflower.
For Jerusalem artichokes, the tuber is planted. For others in this family, allow the plants to flower, collect dry seeds.
Pea, Bean, Legume or Pulse Family (Fabaceae)
bean, lentil, pea, peanut, soybean
Allow beans and peas to dry in their pods on plants before collecting and storing.
Nightshade Family (Solanaceae):
cape gooseberry, eggplant, ground cherry, pepper, potato, tomatillo, tomato.
Allow fruits to fully ripen. Seed must be separated from flesh. Letting tomato pulp ferment in water for a few days is helpful. Seed should be rinsed and dried thoroughly before being stored. Potatoes are grown from tubers not seeds.