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 Erechtites

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1 Denuded receptacle 5-8 mm in diameter; achenes 2-3 mm long, with 10-12 ribs
1 Denuded receptacle 9-12 mm in diameter; achenes 4-5 mm long, with 16-20 ribs