Invasive Species Council of Manitoba

Hoary Alyssum

Berteroa incana

Native to Europe, Hoary Alyssum is an annual or short-lived perennial that displaces native species, especially those found in dry prairies and sand blowouts where vegetation is sparse. It can establish itself in sandy or gravelly soils, along roadways and rail lines and in heavily grazed pastures.

Stems are hairy grow to be 0.7 m tall and branch near the top. The grey leaves are also hair and rough to the touch. The small white flowers have 4 deeply notched petals and bloom from June to August.

Seeds disperse as a contaminant in hay and are spread by vehicles, equipment, footwear, wildlife and birds. It reduces the hay quality and value. This plant is also toxic to horses when consumed it can cause fever and other ailments, but death only occur if large quantities are consumed.

Information Provided by the Invasive Plant Council of BC

Resources

2011 Rural Municipality Distribution Map

2010 Rural Municipality Distribution Map

Hoary Alyssum MWSA 2009 Survey Map

Alberta Invasive Plant Council Fact Sheet

Back to Terrestrial Invasive Species List

Invasive Species Council of Manitoba

Hoary Alyssum

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