Photo courtesy of Center for Aquatic and Invasive Plants


Scientific Name: Alternanthera philoxeroides (Mart.) Griseb
Common Name: Alligatorweed
Family: Amaranthaceae (Amaranth)
Class: Dicot
Description: Emersed or submersed perennial, leaves opposite and simple, flowering head of small white flowers borne in axils.
US Distribution: Coastal states from Virginia to Texas
Worldwide Distribution: Native to South America
Ecology: Rooted in shallow submersed habitats to moist soil sites; may form floating mats
Economic Importance: Major nuisance to subtropical aquatic sites and wetland areas, especially ditch and stream habitats
Ecological Importance: Major impact on aquatic and wetland sites
Notes: Some evidence exists for two biotypes with different responses to biocontrol and chemical controls; aquatic form has a hollow stem.
This entry was posted in Aquatic Plants.