U.S. DEPARTMENT OF THE INTERIOR
BUREAU OF LAND MANAGEMENT
California
Bishop Field Office
Noxious Weeds
Puncture vine (
Tribulus terrestris
L.)
Caltrop family (
Zygophyllaceae
)
Weeds
What is a Weed?
Control and Prevention
Weed Identification Handbook
Weed Glossary
Weed Map
GROWTH HABIT:
Mediterranean annual, mat forming, trailing stems to 5 feet (1.5 m) long.
LEAVES:
Opposite, hairy
, divided into 4 to 8 pairs of leaflets. Oval leaflets ¼ to ½ inch (6-12 mm) long.
FLOWERS:
Yellow
with 5 petals in leaf axils, to ½ inch (12 mm) wide.
SEEDS:
Fruits break into
5 sections
with 2 to 4 seeds per capsule. Capsules tack-like structures with 2 sharp spins,
resembling the head of a goat
.
OTHER:
Toxic to livestock in a vegetative condition. Fruits cause mechanical injury. Easily dispersed by vehicles and road grading equipment.
KEY CHARACTERS:
Mat forming with opposite, divided and hairy leaves.
Seed resembles head of goat.
DISTRIBUTION:
Along roadsides throughout the Owens Valley, especially prolific along Dixon and Barlow lanes – Inyo County