- Plants
- ›Vascular Plants
- ›flowering plants
- ›Dicots
- ›Gentians, Dogbanes, Madders, and Allies
- ›Dogbane Family
- ›milkweeds
- ›Asclepiadeae
- ›Tylophorinae
- ›Vincetoxicum
black swallow-wort
Vincetoxicum nigrum
Cynanchum louiseae, a species in the milkweed family, is also known as black swallow-wort, Louise's swallow-wort, or black dog-strangling vine. Cynanchum louiseae is a species of plant that is native to Europe and is found primarily in Italy, France, Portugal, and Spain. It is an invasive plant species in the northeastern United States, parts of the Midwest, southeastern Canada, and California.
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Vincetoxicum nigrum in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 208963.