Also called Louise's swallow-wort and black dog-strangling vine.  Formerly called Cynanchum nigrum and Vincetoxicum nigrum.

Among the various milkweed  genus Asclepias and related genera.   Part of genus Cynanchum in dogbane  family Apocynaceae.

Native to southern 🇪🇺 Europe.   🗺 Map by county (🇺🇸 USA-48) (color key).   Invasive > learn+quiz Invasive > 🇨🇦 🇺🇸 Canada+USA Invasive > report it! Invasive > Michigan  Adobe Acrobat Reader file (page 50)   Inv. trading card  Adobe Acrobat Reader file

🚼︎ For kids!  This plant described in invasive species placemat  Adobe Acrobat Reader file series.

Uses by native peoples
(Ethnobotany database)   On No-Planting List by Seneca Nation of Indians SNI.  Adobe Acrobat Reader file (page 61)

This plant is particularly harmful in areas with the monarch butterfly  Danaus plexippus, as this plant is similar enough to milkweed  genus 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.

Learn more about ◼︎ black swallow-wort Cynanchum louiseae

Treatment methods and timing (40–45°N lat.)  Adobe Acrobat Reader file Management and Control (Wisconsin)  Adobe Acrobat Reader file Best Control Practices BCP (Michigan)  Adobe Acrobat Reader file Fact sheet (Ontario)  Adobe Acrobat Reader file Fact sheet (Ontario) 🇫🇷 en français  Adobe Acrobat Reader file
Biological Control in Eastern USA  Adobe Acrobat Reader file (page 217)

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milkweed  genus Asclepias and related genera ◼︎ white swallow-wort  Vincetoxicum hirundinaria