Hoary Alyssum (Berteroa incana)
2B, widespread in Montana
Quick ID
- Flower with notched petals; four white petals that are narrow at base and spread upwards
- Two short outer stamens and four long inner stamens
- Rosette with long-stalked, oval to lance-shaped leaves
- One to three and a half feet tall
Hoary Alyssum
Video Information
Weed Images
Weed Specifications
| Type | Information |
|---|---|
| Toxicity | Toxic to horses. |
| Best Management Practices | Hand pulling is effective for small-scale infestations; shallow tilling should sever the taproot below the root crown to be successful; revegetation can suppress invasive population. |
| Habitat | Thrives on dry and disturbed land; commonly found growing along roads, trails, lawns, and farmyards. |
| Root | Deep penetrating taproot. |
| Leaves | Basal rosette has oval to lance-shapes leaves which are broadest at the tip; stem leaves point upward, alternate, and are similar in shape to rosette leaves. |
| Lifespan | Annual, biennial, or short-lived perennial. |
| Similar Looking Plants | Falseflax, pennycress. |
| Important Information | Forage and lawn seed contamination may contribute to long distance seed dispersal, and seeds may also travel long distance via mowers, vehicles, other machinery, and in contaminated soil and gravel. |
