Black Swallow-wort ​(Vincetoxicum nigrum) &
Pale Swallow-wort (Vincetoxicum rossicum​)

• See MISIN species profiles for black swallow-wort and pale swallow-wort
• ​One of our Early Detection & Rapid Response species, currently only found in the village of Kingsley* within our four-county service area
• Tricks Monarch butterflies into laying their eggs on the stem and leaves
• See ISN's efforts in swallow-wort removal
• Have black swallow-wort and want it removed? Check out our cost-share program

*black swallow-wort only. Pale swallow-wort has not been found in our service area

Comparison of butterfly milkweed (left), common milkweed (middle), and black swallow-wort (right)

Images provided by Leslie Mehrhoff, University of Connecticut

Report Invasive Species