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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Tribulus

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1 Petals 8-22 mm long; peduncles > 2 cm long; perennial
1 Petals 3-5 mm long; peduncles < 1 cm long; annual
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