Plantae > Tracheophyta > Magnoliopsida > Caryophyllales > Amaranthaceae > Alternanthera > Alternanthera philoxeroides
 

Alternanthera philoxeroides (alligator weed; alligatorweed; pig weed; Xi han lian zi cao)

Synonyms: Bucholzia philoxeroides

Wikipedia Abstract

Alternanthera philoxeroides, commonly known as Alligator weed, is an immersed aquatic plant. It originated in South America, but has spread to many parts of the world and is considered an invasive species in Australia, China, New Zealand, Thailand and the United States. Alligator weed can grow in a variety of habitats, including dry land, but is usually found in water. It may form large interwoven mats over the water or along shorelines. Alligator weed stems are long, branched, and hollow.
View Wikipedia Record: Alternanthera philoxeroides

Invasive Species

Alternanthera philoxeroides, commonly known as alligator weed, is a perennial stoloniferous herb that can be found in many parts of the world, infesting rivers, lakes, ponds and irrigation canals, as well as many terrestrial habitats. The aquatic form of the plant has the potential to become a serious threat to waterways, agriculture and the environment. The terrestrial form of Alternanthera philoxeroides grows into a dense mat with a massive underground rhizomatous root system. The canopy can smother most other herbaceous plant species. It has proven to be extremely expensive to attempt controlling Alternanthera philoxeroides.
View ISSG Record: Alternanthera philoxeroides

Attributes

Height [1]  3.9 inches (0.1 m)
Screening - Summer [1]  Porous
Screening - Winter [1]  Porous
Hardiness Zone Minimum [1]  USDA Zone: 6 Low Temperature: -10 F° (-23.3 C°) → 0 F° (-17.8 C°)
Light Preference [1]  Mixed Sun/Shade
Soil Acidity [1]  Neutral
Soil Fertility [1]  Infertile
Water Use [1]  High
Flower Color [1]  White
Foliage Color [1]  Green
Bloom Period [1]  Early Spring
Drought Tolerance [1]  Low
Fire Tolerance [1]  None
Frost Free Days [1]  6 months 20 days
Fruit/Seed Begin [1]  Spring
Fruit/Seed End [1]  Summer
Growth Form [1]  Stoloniferous
Growth Period [1]  Spring
Growth Rate [1]  Rapid
Leaf Type [2]  Evergreen
Lifespan [1]  Perennial
Propagation [1]  Sprig
Regrowth Rate [1]  Slow
Root Depth [1]  10 inches (25 cm)
Seed Spread Rate [1]  None
Shape/Orientation [1]  Prostrate
Structure [2]  Herb
Vegetative Spread Rate [1]  Rapid

Protected Areas

Name IUCN Category Area acres Location Species Website Map Climate Land Use
Canaveral National Seashore II 9090 Florida, United States
Carolinian-South Atlantic Biosphere Reserve 310228 North Carolina, South Carolina, Georgia, United States      
Central Gulf Coastal Plain Biosphere Reserve 40530 United States  
De Soto National Wildlife Refuge IV 8007 Iowa, Nebraska, United States
Defensores del Chaco National Park II 1792493 Paraguay  
El Palmar National Park II   Entre Rios, Argentina  
Everglades and Dry Tortugas Biosphere Reserve   Florida, United States  
Gulf Island National Seashore II 67487 Florida, Mississippi, United States
Hobcaw Barony (North Inlet) National Estuarine Research Reserve 7585 South Carolina, United States
Lacassine National Wildlife Refuge VI 28351 Louisiana, United States
Río Pilcomayo National Park II 123699 Formosa, Argentina
Reserva de Biosfera del Chaco   Paraguay        
Reserva Natural Otamendi Strict Nature Reserve Ia   Buenos Aires, Argentina  
Santee Coastal Reserve and Washo Reserve State Habitat Area IV 20850 South Carolina, United States  

Predators

Hypolimnas bolina (Great egg fly butterfly)[3]
Junonia almana (Peacock Pansy)[3]
Junonia atlites (Gray Pansy)[3]
Vogtia malloi (alligator weed stem borer)[3]

Distribution

Caribbean; North America;

Photos

Citations

Species recognized by , , in Catalog of Life 2011
Attributes / relations provided by 1USDA Plants Database, U. S. Department of Agriculture 2Kattge, J. et al. (2011b) TRY - a global database of plant traits Global Change Biology 17:2905-2935 3HOSTS - a Database of the World's Lepidopteran Hostplants Gaden S. Robinson, Phillip R. Ackery, Ian J. Kitching, George W. Beccaloni AND Luis M. Hernández
Invasive Status provided by Global Invasive Species Database Downloaded on 10 May 2011.
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access