Common names: South American spongeplant; West Indian spongeplant
Limnobium laevigatum (South American spongeplant) is a perennial aquatic plant (family Hydrocharitaceae) found on the San Joaquin river and the Sacramento-San Joaquin delta. The spongplant can form thick mats across the water causing problems for boats, fish, and water infrastructure. Limbnobium laevigatum can spread rapidly through quick seed production and vegetative growth. The small, floating seeds easily disperse once produced.Cal-IPC Rating: High
Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.
Cal-IPC Newsletter Articles
- CDFA expands noxious weed list and revises process. Kelch, Dean. Vol 23, Issue 2
- Spongeplant treatment to begin in Delta . Cal-IPC. Vol 20, Issue 4
- Cal-IPC Inventory update adds eight plants. Brusati, Elizabeth. Vol 19, Issue 3
- Spongeplant: A new aquatic weed threat in Delta. Anderson, Lars. Vol 19, Issue 1
Cal-IPC Symposium Presentations
- None for this species
Other Limnobium laevigatum Information
- CalFlora - Distribution information based on submitted observations and herbarium specimens.
- CalWeedMapper - Distribution information with ability to determine regional priorities.
- USDA PLANTS Database - Federal database with information on identification and distribution, and links to websites in individual states.