This aquatic species a US federally declared noxious weed, which means its importation and transportation are illegal, both interstate an...Read Mored intrastate. It is part of the giant Salvinia species complex.
In addition, 14 states also have prohibitions on its sale or transportation under noxious weed legislation.
It forms mats up to 2' thick on the surfaces of ponds and other bodies of water. It develops very different growth forms under different conditions which look like entirely different plants.
BONAP reports it's naturalized in 15 states. It is easily transported unintentionally on boat hulls and other recreational equipment.
Josephine, Arlington, TX (Zone 8a) | December 2006 | negative
Giant Salvinia, Water Fern, Kariba Weed, Aquarium Water Moss, Koi Kandy, Butterfly Fern, Cat's Tongu Salvinia molesta is naturalized in t...Read Moreexas and other States and is considered an invasive noxious plant.
It is prohibited in Texas.
Woodland Park, CO (Zone 4b) | November 2004 | negative
U. S. FEDERALLY LISTED NOXIOUS WEED.
Not allowed for import to the US and not allowed in any interstate or intrastate transportat...Read Moreion without a permit from USDA APHIS PPQ (Plant Protection and Quarantine).
FYI: This plant is a Class A Noxious Weed in the state of Vermont. Its movement, importation, sale, possession, cultivation and/or dist...Read Morerbution is prohibited with fines upto $1000.00 possible
Giant Salvinia is illegal to sell in the U.S. It is possibly the worlds worst aquatic weed. It grows very rapidly. It severely diminis...Read Morehes the habitat for fish and other living creatures in the body of water.
Check out what happened to Lake Wilson in Hawaii when someone dumped Salvinia into it.
New Orleans, LA (Zone 9a) | November 2003 | negative
I believe this is an invasive exotic in Louisiana which outcompetes duckweed, an important food source for migratory waterfowl. It may b...Read Moree another species that I am thinking of, but it is definitely a Salvinia that we are having a problem with.
This aquatic species a US federally declared noxious weed, which means its importation and transportation are illegal, both interstate an...Read More
Giant Salvinia, Water Fern, Kariba Weed, Aquarium Water Moss, Koi Kandy, Butterfly Fern, Cat's Tongu Salvinia molesta is naturalized in t...Read More
PLEASE NOTIFY AUTHORITIES if you find this horrible exotic fern growing in your area. MN4
U. S. FEDERALLY LISTED NOXIOUS WEED.
Not allowed for import to the US and not allowed in any interstate or intrastate transportat...Read More
FYI: This plant is a Class A Noxious Weed in the state of Vermont. Its movement, importation, sale, possession, cultivation and/or dist...Read More
Giant Salvinia is illegal to sell in the U.S. It is possibly the worlds worst aquatic weed. It grows very rapidly. It severely diminis...Read More
I believe this is an invasive exotic in Louisiana which outcompetes duckweed, an important food source for migratory waterfowl. It may b...Read More