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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 Ononis

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1 Stems procumbent to ascending, uniformly hairy; leaflets < 3× as long as wide, obtuse to emarginate
1 Stems ascending to erect, mainly hairy along 1 side, or along 2 opposite sides; leaflets > 3× as long as wide, acute or nearly so