Sugar beet
From Cookipedia
Sugar beet (Beta vulgaris L.), a member of the Chenopodiaceae family, is a plant whose root contains a high concentration of sucrose. It is grown commercially for sugar production.
The sugar beet is directly related to the beetroot, chard and fodder beet, all descended by cultivation from the sea beet.
The European Union, the United States, and Russia are the world's three largest sugar beet producers, although only the European Union and Ukraine are significant exporters of sugar from beets. Beet sugar accounts for 30% of the world's sugar production.