U.S. DEPARTMENT OF THE INTERIORBUREAU OF LAND MANAGEMENT
|Surprise Field Office|
Puncturevine (Tribulus terrestris)
Description: Annual with prostrate or somewhat ascending, mat forming, trailing stems, each about 1/2 to 5 feet long. Leaves opposite, hairy, and divided into 4 to 8 pair of leaflets. Flowers yellow, with 5 petals. Fruit hard, about 1/2 inch across, separating into five parts when mature, each with 2 to 4 sharp, hard spines, resembling a goat's head.