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Spirodela polyrhiza (L.) Schleid.
Common duckweed

Spirodela polyrhiza

Family: Araceae

Group: Monocot

Substrate: Freshwater Aquatic

Habit: Herb

Perennation: Annual

Native Range: Widespread in North America, the West Indies, Mexico, Central America, South America and the Old World in both temperate and tropical regions.

Map of select IRC data for peninsular Florida

IRC SOUTH FLORIDA Status: Rare

SOUTH FLORIDA Occurrence: Present

SOUTH FLORIDA Native Status: Native

SOUTH FLORIDA Cultivated Status: Assumed to be Cultivated

Comments: For images and more information, visit the University of Florida, Center for Aquatic and Invasive Plants website.

Other data on Spirodela polyrhiza available from :

Atlas of Florida Vascular Plants
Spirodela polyrhiza has been found in the following 11 conservation areas :
Occurrence Native Status
Big Cypress National Preserve Present Native
Corkscrew Swamp Sanctuary Present Native
Everglades National Park Assumed to be Present Native
Fakahatchee Strand Preserve State Park Present Native
Fern Forest Nature Center Present Native
Holey Land Wildlife Management Area Present Native
LaBelle Nature Park Present Native
Lake Okeechobee Marshes Present Native
Prairie Pines Preserve Present Native
Six Mile Cypress Slough Preserve Present Native
Wild Turkey Strand Preserve Present Native

Spirodela polyrhiza has been found in the following 6 counties :
Occurrence Native Status
Broward County Native
Collier County Native
Glades County Native
Hendry County Native
Miami-Dade County Native
Palm Beach County Native

Spirodela polyrhiza has been found in the following 3 habitats :
Disturbed Wetland
Dome Swamp
Strand Swamp

All Images:

Spirodela polyrhiza