A tariff dispute made the tomato a legal vegetable
The classification arose from a practical question at the customs desk: what import duty should apply to tomatoes? Under the tariff rules at issue, vegetables were taxed while fruit was not. Importers argued that tomatoes belonged in the fruit category, so the lower-duty treatment should follow.
The Supreme Court resolved the dispute in 1893 in Nix v. Hedden. Rather than asking botanists to classify the plant, the justices considered how people ordinarily use the words “fruit” and “vegetable” in commerce and at meals. In everyday usage, tomatoes were treated as vegetables—served with meals, not as dessert—so the tariff category followed that common understanding.
Two kinds of classification answer different questions
Botany uses a plant’s structure: a fruit develops from a flower and contains seeds. A tomato fits that definition. The legal dispute, however, was not about how tomatoes develop; it was about what a tariff term meant to merchants and consumers in ordinary life.
That distinction matters because a label can be accurate for one purpose and unsuitable for another. The ruling did not change tomato biology or establish that culinary categories override science. It decided how the word “vegetable” worked in a particular tariff law.
The result is a small but memorable example of law following the language of a marketplace: at the border, the tomato’s place in a meal mattered more than its place in a plant.
