Because of its invasiveness, potential for spread, and economic and environmental impact Alligator weed is classed as a ‘Weed of National Significance' by the Australian government. This durable and persistent weed invades both land and water environments and resists many control measures. It is found in most coastal areas of Australia, including South East Queensland.
Alligator weed is highly adaptable and can grow in a variety of ways. This includes with roots embedded in the banks of rivers, dams or lakes, at the bottom of shallow water, or floating freely on the surface. The leaves spread out across the water, interconnecting and forming dense mats. It has hollow stems which help it float, and the roots are thin and stringy, trailing in the water.Declared a Weed of National Significance