Tribulus is also a derivative Roman era (Latin language) name for the weapon known in English today as the Caltrop, which bears strong resemblances with the plant today named Latin: Tribulus terrestris or puncture vine.

Tribulus is a genus of plants found in many warm regions. The best-known member is T. terrestris (puncture vine), a widespread weed and also the source of a dietary supplement.

Tribulus species are perennial, but some grow as annuals in colder climates. The leaves are opposite and compound. The flowers are perfect (hermaphroditic) and insect-pollinated, with fivefold symmetry. The ovary is divided into locules that are in turn divided by "false septa" (the latter distinguish Tribulus from other members of its family).