Also called swallowwort and dog-strangling vine.  Formerly called Vincetoxicum rossicum.

Native to southern 🇪🇺 Europe.

This plant is particularly harmful in areas with the monarch butterfly Danaus plexippus , as this plant is similar enough to milkweed (Asclepias and related genera) to attract Monarch adults to lay their eggs on it, but different enough that their young (monarch caterpillars) cannot feed on it, thus eliminating these monarchs from the ecosystem.  Invasive > learn+quiz Invasive > Global Invasive > in USA+Canada Invasive > report it! Invasive > in USFS Invasive > in Michigan

For kids!  This plant described in invasive species placemat series (print "Shrink oversized pages" or "Poster" or on 17"x11" paper).

Learn more about pale swallow-wort Cynanchum rossicum

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