Historical reference: Do not rely on this information. It is very old. About this collection
Biennials, plants that complete their life-cycle in two years or seasons, as in the case of the turnip. They commonly only produce root, stem, and leaf structures during the first season, though often storing up nutriment in fleshy enlargements of such structures. In the second season they produce flowers and fruit ("run to seed") at the expense of such food stores, and die in completing this physiologically exhausting process.