Black Swallow-Wort, identification of the Wisconsin Invasive Species Vincetoxicum nigrum
Why the open web links it
Explains how to identify the invasive plant Black Swallow-Wort, Vincetoxicum nigrum, in Wisconsin.
Linked by 2 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including wisc.edu, umaine.edu.