Invasive Plants in Texas

Texas Recreation and Parks Society

Invasive Plants

Invasive species are animals, plants, and other living things that spread rapidly in new environments where there are almost no natural controls on their growth.

Texas Parks and Recreation Society

The Texas Recreation and Park Society (TRAPS) is a non-profit educational organization committed to fix parks, recreation and leisure services in Texas.

Giant Salvina

It's a fern that is floating and it originally came from Brazil. It's uncertain how that plant got to the states, but some people predicted that the infestations have started after being used as an ornamental plant. It arrived in the lakes on Texas through dumping aquariums into lakes/ponds, boating and fishing

Life Cycle

Reproduce by fragmentation

The Giant Salvinia is a quickly spreading plant the can double its biomass every few weeks.

It is found in loud slow moving water such as lakes of ponds.

It has natural predators like grasshoppers and moths.

Why we want to keep it on the red list.

  • it damages aquatic ecosystems
  • decreases oxygen in the area
  • blocks out sunlight

Crested Floating Heart

Crested floating hearts originate from Asia. They have relocated into the United States, mostly into South Florida canals but have been moving westward since. They were brought over from Asia as a garden plant and spread due to flooding.

Life Cycle

They are monoecious, so they can reproduce by themselves

Rooted in shallow water

It grows best in tropical to subtropical climate zones

Why we want to move it to the red list.

  • quickly cover the water
  • clog storm drains
  • blocks out sunlight

Work Cited

"Giant Salvinia." Texas Parks & Wildlife Department | Welcome. 29 July 2009. Web. 20 May 2011. .

Jacono, C. C. "Identification." Giant Salvinia - Salvinia Molesta. 25 Feb. 2003. Web. 20 May 2011. .

"New Aquatic Invasive Species: Crested Floating Heart – How Far Can It Go?" New Aquatic Invasive Species: Crested Floating Heart – How Far Can It Go? Web. 06 Jan. 2016.

Kathleen Craddock Burks. “Nymphoides Cristata (roxb.) Kuntze, a Recent Adventive Expanding

as a Pest Plant in Florida”. Castanea 67.2 (2002):

Willey, L.N. 2012. Biology and control of the invasive aquatic plant crested floating heart (Nymphoides cristata). MS Thesis, University of Florida, Gainesville, FL