Carbohydrates
Potatoes are tubers, not seeds.
Bettongs are omnivorous. They feed on seeds, roots, bulbs, tubers, resin underground fungi and insects.
Bush gophers primarily feed on roots, shrubs, and grasses. They may also consume seeds, tubers, and bulbs found in the soil. Additionally, they have been known to eat small insects and larvae as well.
Many flowering plants use their seeds to spread but some also use their bulbs, roots or stems. Daffodil and tulip bulbs make lots of tiny baby bulbs. Each bulb produces a new flower. Tubers and rhizomes are underground roots or stems swollen with food. We eat some tubers, such as potato and carrot tubers.
Bettongs are omnivorous. They feed on seeds, roots, bulbs, tubers, resin underground fungi and insects.
Leaves (spinach), roots and tubers (radishes), stems and buds (broccoli), fruits (peppers), seeds (corn)
seeds or tubers
Plant fruting bodies and seeds Plant leaves Planr roots Plant tubers and corms Plant stems
They don't reproduce by seeds. They are corms, or tubers, and reproduce by making new corms, or tubers.
They can be but most are started from tubers.
Horseradish blooms in mid-summer, if it blooms at all. Most horseradish sold in the United States is sterile and is propagated through the tubers/roots instead of seeds from flowers.
Cabbage don't have storage roots or tubers, they are not a root vegetable. All the energy goes into producing flowers and seeds, if they are not cut down before.