Black swallow-wort(also known as Black dog-strangling vine, Louise's swallow-wort)
Cynanchum louiseae (L.) Kartesz & Gandhi
Cynanchum nigrum (L.) Pers., non Cav.
Vincetoxicum nigrum (L.) Moench
- Moss, Flora of Alberta – No
- Global Invasive Species Database –
- NatureServe I-Rank – High
- AB Weed Act status – ?
"...Large, monospecific stands can form in open, fully-exposed areas. In brushy areas, these vines can over-top and smother shrubs, forming the dominant cover..."
 Link to Wikipedia, Cynanchum_louiseae - "...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..."
 Link to USDA Plants, Profile and map for Cynanchum louiseae Kartesz & Gandhi, Louise's swallow-wort