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.
Click images to enlarge and show more photo credit.
Key to Vincetoxicum
Apocynaceae
Vincetoxicum
https://fsus.ncbg.unc.edu/main.php?pg=show-key.php&keyid=40862
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