- Eichhornia crassipes is a free floating aquatic plant that has invaded aquatic areas throughout the eastern and southern portions of the United States. Plants can grow to 3 ft. (1 m) in height.
- The leaves are oval to elliptical, thick, up to 6 in. (15 cm) wide and waxy with spongy petioles. Leaves curve inward at the edges.
- The very showy blue-purple flowers are born on upright spikes. Each flower has six petals with the uppermost having a yellow patch.
- This plant reproduces chiefly by vegetative means.
- Ecological Threat
- Eichhornia crassipes invades lakes, ponds, rivers, marshes, and other types of wetland habitats. It can quickly form dense floating mats of vegetation (populations can double in size in two weeks!). These dense mats restrict light to the underwater environment, reduce the light availability for submersed plants and aquatic invertebrates, and deplete the oxygen levels. Eichhornia crassipes is native to South America and was first introduced as an ornamental into the United States in 1884 at the Cotton States Exposition in New Orleans.
- Biological Control of Invasive Plants in the Eastern United States - USDA Forest Service
- Southeast Exotic Pest Plant Council Invasive Plant Manual - SE-EPPC
- Element Stewardship Abstract - The Nature Conservancy
- Identification and Biology of Non-Native Plants in Florida's Natural Areas - University of Florida
- Invasive Plant Atlas of New England - University of Connecticut
- Global Invasive Species Database - Invasive Species Specialist Group
Image Sets View other image sets:
EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org
State Invasive List - This map identifies those states that list this species on their invasive species list. For more information, visit Invasive.org
Most Troublesome / Most Common Agricultural Weed List
This map identifies those states that consider this species either most troublesome or most common in at least one commodity. For more information, visit the MTMC project page.
|No Data for this state|
|Troublesome or Common weed in one or more crops|
Invasive Listing Sources
- Alabama Invasive Plant Council
- Alabama Noxious Weeds - Class C Noxious Weed
- Alachua County Cogongrass Initiative
- Apalachicola Invasive Working Group
- Arizona Noxious Weeds
- Arkansas Noxious Weeds - Noxious/Prohibited
- California Invasive Plant Council
- California Noxious Weeds
- Colorado Noxious Weeds
- Connecticut Invasive Plant List
- Delaware Natural Resources and Environmental Control, 2004
- East Central Florida CISMA
- EDDMapS Ontario
- Faith Campbell, 1998
- Florida Exotic Pest Plant Council - Category I
- Georgia Exotic Pest Plant Council - Category 1
- Gulf of Mexico Regional Panel, Aquatic Nuisance Species Annual Report, 2001
- John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
- Mid-Atlantic Exotic Pest Plant Council, 2005
- Native Plant Society of Oregon, 2008
- Nonnative Invasive Species in Southern Forest and Grassland Ecosystems
- South Carolina Noxious Weeds
- Tennessee Exotic Pest Plant Council
- Texas Noxious Weeds
- Treasure Coast Cooperative Invasive Species Mgmt. Area - EARLY DRAFT
- Virginia Invasive Plant Species List
- WeedUS - Database of Plants Invading Natural Areas in the United States
Other System LinksPlants: EICR
NPDN Pest: PECABBA
NPDN Host: 31827
|Common Name Reference:|| USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|
|Scientific Name Reference:||USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|