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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Zygophyllaceae||View Description||Dichotomous Key|
|Genus: Tribulus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Tribulus terrestris L.
Stem: +- silky or appressed-hairy, also sharply bristly. Leaf: stipules 1--5 mm; leaflets 6--12. Flower: < 5 mm wide; pedicel generally < subtending leaf. Fruit: 5 mm, < 1 cm wide, +- flat, hairy, gray or +- yellow; spines 4--7 mm, spreading, hairy to glabrous.
Ecology: Dry, disturbed areas including roadsides, railways, vacant lots; Elevation: generally < 1000 m. Bioregional Distribution: CA; Distribution Outside California: to Wyoming, eastern United States, central Mexico; native to Mediterranean. Toxicity: TOXIC to livestock in vegetative condition, fruits cause mechanical injury. Flowering Time: Apr--Oct Note: First collected in California in 1902; long a pernicious weed, now controlled by introduced weevils.
eFlora Treatment Author: Duncan M. Porter
Jepson Online Interchange
Previous taxon: Tribulus
Next taxon: Zygophyllum
Citation for this treatment: Duncan M. Porter 2016. Tribulus terrestris, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=46922, accessed on July 30, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on July 30, 2016.