Its name means literally "Cabbage Flower" and was first developed in the 16th century from wild cabbage. Like most members of the cabbage family, it contains anti-cancer compounds, which decrease rapidly after cooking for over 5-10 minutes. Many different varieties exist.
Want to learn more? Look up Cauliflower on Wikipedia.
STORE: In the fridge. Keep in a plastic bag or sealed container for maximum freshness.