Tribulus terrestris L.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Zygophyllaceae
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Scientific Name
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Description
Species Description - Annual; stems hirsute, branched from the base, forming mats to 1 m wide; lvs short-petioled, 2–6 cm, one of each pair distinctly the larger; lfls usually 6–8 pairs, oblong, 5–15 mm; peduncles 5–10 mm; fls 8–10 mm wide; intrastaminal glands distinct, not forming a ring; body of the fr 1 cm thick, each segment with 2 stout divergent spines and a longitudinal row of tubercles; 2n=12, 24, 26, 48. Native of the Mediterranean region, well established as a roadside weed in w. U.S., and occasionally found in our range.
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Common Names
puncture vine