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 claimed to increase the body's natural testosterone levels and thereby improve male sexual performance and help build muscle.

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 five-fold 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).

In weight lifting Tribulus supplements are often used as post cycle therapy or "PCT". After a subject is done taking a synthetic testosterone supplement Tribulus is used in order to restore the body's natural testosterone levels.

Some species are cultivated as ornamental plants in warm regions. Some, notably T. cistoides, T. longipetalus, T. micrococcus, T. terrestris, and T. zeyheri, are considered weeds.

[edit] External links

Article on hazards of Tribulus species from Botanical Dermatology Database
Technical description of Zygophyllaceae from The Families of Flowering Plants, L. Watson and M. J. Dallw

Tribulus

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Triblus

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