Features: The Scarlet Ammannia (Ammannia robusta) is an annual plant which grows in wet areas such as shorelines and the edges of wetlands. Fluctuating water levels are thought to be important for the long-term persistence of the species at a site. A member of the Loosestrife family, it produces tiny lavender-coloured flowers. Seeds can persist in mud for years.

Status: Endangered Provincially and Nationally

Range: A widespread species, ranging from southern British Columbia south to Mexico, east throughout central North America to Ohio and southwestern Ontario. In Ontario, the species has been recorded at four sites in Essex County and Pelee Island, but may now be restricted to two sites. Range Maps

Threats: The species appears to be declining in Ontario. The main threats are wetland drainage, quarry and housing development and dirt bike use.

Protection: The Scarlet Ammannia is listed as endangered under Ontario's Endangered Species Act, 2007. The Act protects the plant from being harmed, collected or killed. Most of the Ontario populations are on public land, but one site is on a private wildlife sanctuary.

Text Sources: Douglas and Oldham 1998

Last Modified Date: October 2008