Puncturevine
Tribulus terrestris

Adult
Puncturevine adult
Puncturevine is an annual, spreading its multiple stems prostrate along the ground. Stems may be up to five feet long.
Rosette
Puncturevine rosette
Leaves are compound pinnate with four to eight pairs of leaflets. Each leaflet is less than half an inch long.
Infestation
Puncturevine patch
A native to Europe, puncturevine is common along roadsides, in farm areas, pastures, cultivated fields, and waste areas.
Flower
Puncturevine flower
Small yellow flowers have five petals and are about one-third inch wide. Bloom is in late spring and early summer.
Seed
Puncturevine seed
The flowers produce hard, spiny, five-lobed fruits. At maturity the fruit breaks into tack-like structures each containing two to four seeds.
Root
Puncturevine root
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