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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 Martyniaceae

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1 Sepals separate; corolla yellow; fertile stamens 2; fruit echinate with numerous broad-based spines
1 Sepals connate for >1/2 their length; fertile stamens 4; corolla purplish; fruit sculptured with elongate ridges