Plants Profile for Alternanthera philoxeroides (alligatorweed)

General Information
Symbol:	ALPH
Group:	Dicot
Family:	Amaranthaceae
Duration:	Perennial
Growth Habit:	Forb/herb
Native Status:	L48 I PR I
Characteristics
Data Source and Documentation

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	Native		Introduced		Both		Absent/Unreported
	Native, No County Data		Introduced, No County Data		Both, No County Data

Native Status:

L48

NAV

CAN

SPM

Images

click on a thumbnail to view an image, or see all the Alternanthera thumbnails at the Plants Gallery

Robert H. Mohlenbrock. USDA SCS. 1991. Southern wetland flora: Field office guide to plant species. South National Technical Center, Fort Worth. Provided by USDA NRCS Wetland Science Institute (WSI). Usage Requirements.

©Larry Allain. USGS National Wetlands Research Center (NWRC). Usage Requirements.

©Jeff McMillian. Provided by Almost Eden. United States, LA. Usage Requirements.

USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. Provided by NRCS National Wetland Team. Usage Requirements.

Synonyms

Symbol	Scientific Name
ACPH	Achyranthes philoxeroides (Mart.) Standl.

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.

Rank	Scientific Name and Common Name
Kingdom	Plantae – Plants
Subkingdom	Tracheobionta – Vascular plants
Superdivision	Spermatophyta – Seed plants
Division	Magnoliophyta – Flowering plants
Class	Magnoliopsida – Dicotyledons
Subclass	Caryophyllidae
Order	Caryophyllales
Family	Amaranthaceae – Amaranth family
Genus	Alternanthera Forssk. – joyweed
Species	Alternanthera philoxeroides (Mart.) Griseb. – alligatorweed

Subordinate Taxa

This plant has no children

Legal Status

Noxious Weed Information
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all Federal and State Noxious Weeds.
Alabama alligatorweed Class C noxious weed
Arizona alligatorweed Prohibited noxious weed
Arkansas Alternanthera alligatorweed Noxious weed
California alligatorweed A list (noxious weeds)
Florida alligatorweed, green lead plant Prohibited aquatic plant, Class 1
South Carolina alligatorweed Invasive aquatic plant alligatorweed, pigweed Plant pest
Texas alligatorweed Noxious plant

U.S. Weed Information
Alternanthera Alternanthera philoxeroides alligator weed This plant and the related entity italicized and indented above can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
STATE	Assorted authors. State noxious weed lists for 46 states. State agriculture or natural resource departments.
FLEPPC	Florida Exotic Pest Plant Council. 1999. Invasive plant list. Florida Exotic Pest Plant Council. Florida.
SEEPPC	Southeast Exotic Pest Plant Council. 1996. Invasive exotic pest plants in Tennessee (19 October 1999). Research Committee of the Tennessee Exotic Pest Plant Council. Tennessee.
SWSS	Southern Weed Science Society. 1998. Weeds of the United States and Canada. CD-ROM. Southern Weed Science Society. Champaign, Illinois.

Wetland Status

Interpreting Wetland Status

Top Level Regions
Caribbean	OBL

North America
Arid West	OBL
Atlantic and Gulf Coastal Plain	OBL
Eastern Mountains and Piedmont	OBL
Great Plains	OBL
Midwest	OBL
Western Mountains, Valleys, and Coast	OBL