(also known as purple crown vetch)
Securigera varia (L.) Lassen
Coronilla varia L.
- Moss, Flora of Alberta – rare, page 378 (Coronilla varia)
-  Global Invasive Species Database –
- NatureServe I-Rank – High
- AB Weed Act status – ?
"...This perennial herb is a nitrogen-fixer, alters the fuel loads in fire-adapted ecosystems, creates dense monospecific stands by strongly outcompeting native plants, and impacts high-quality occurences of common and rare native plant communities in the U.S. It is widespread across the U.S., in every state except California, Louisiana, Alaska and North Dakota. It takes at least 3-5 years to manage an infestation of this species..."
 Link to Wikipedia, Securigera varia - "...native to Africa, Asia and Europe and is commonly used throughout the United States and Canada for erosion control, roadside planting and soil rehabilitation. It has become an invasive species in many states of the US..."
 Link to USDA Plants, Profile and map for Securigera varia (L.) Lassen, crownvetch