Turnips

The turnip is a root vegetable commonly grown in temperate climates worldwide for its white, bulbous taproot. Small, tender varieties are grown for human consumption, while larger varieties are grown as feed for livestock.
The turnip is white-skinned apart from the upper 1–6 centimeters, which protrude above the ground and are purple, red, or greenish wherever sunlight has fallen. The above-ground part develops from stem tissue, but is fused with the root. The interior flesh is entirely white. The entire root is roughly conical, but can be occasionally tomato-shaped, about 5–20 centimeters in diameter, and lacks side roots.
The turnip's root is high only in Vitamin C. The green leaves of the turnip top ("turnip greens") are a good source of Vitamin A, folate, Vitamin C, Vitamin K and calcium. Turnip greens are high in lutein (8.4 mg / 100g).