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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 Vincetoxicum

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1 Corolla lobes pubescent on the upper surface; flowering peduncles < 2 cm long; fruiting peduncles < 2.5 cm long
1 Corolla lobes glabrous on the upper surface; flowering peduncles mostly 2-2.5 cm long; fruiting peduncles < 2.5 cm long
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