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Thalassia testudinum Banks & Soland. ex Koenig
Turtle-grass

Thalassia testudinum
Copyright by: Janice Duquesnel

Family: Hydrocharitaceae

Group: Monocot

Substrate: Marine Aquatic

Habit: Herb

Perennation: Perennial

Native Range: Bermuda, southeastern United States, the West Indies, southern Mexico, Central America and northern South America.

Map of select IRC data for peninsular Florida

IRC SOUTH FLORIDA Status: Secure

SOUTH FLORIDA Occurrence: Present

SOUTH FLORIDA Native Status: Native

SOUTH FLORIDA Cultivated Status: Not Cultivated

Comments: For images, click on the USDA PLANTS or Atlas of Florida Vascular Plants links below.

Other data on Thalassia testudinum available from :

Thalassia testudinum has been found in the following 20 conservation areas :
Occurrence Native Status
Bahia Honda State Park Present Native
Bill Baggs Cape Florida State Park Present Native
Biscayne National Park Present Native
Bocilla Preserve Present Native
Crocodile Lake National Wildlife Refuge Present Native
Dagny Johnson Key Largo Hammocks Botanical State Park Present Native
Deering Estate at Cutler Present Native
Dry Tortugas National Park Present Native
Everglades National Park Present Native
Great White Heron National Wildlife Refuge Present Native
Homestead Bayfront Park Present Native
John D. MacArthur Beach State Park Present Native
John Pennekamp Coral Reef State Park Present Native
Key West National Wildlife Refuge Present Native
Lemon Bay Aquatic Preserve Present Native
Lignumvitae Key Botanical State Park Present Native
Long Key State Park Present Native
National Key Deer Refuge Assumed to be Present Native
Rookery Bay National Estuarine Research Reserve Present Native
Sugarloaf Hammocks, Florida Keys Wildlife and Environmental Area Present Native

Thalassia testudinum has been found in the following 6 counties :
Occurrence Native Status
Charlotte County Native
Lee County Native
Martin County Native
Miami-Dade County Native
Monroe County (Keys) Native
Monroe County (Mainland) Native


All Images:

Thalassia testudinum
Copyright by: Janice Duquesnel
Thalassia testudinum
Copyright by: Janice Duquesnel
Thalassia testudinum
Copyright by: plantillustrations.org (public domain)
originally published in Annals of the Missouri Botanical Garden, vol. 60: p. 11, t. 2 (1973) [L. Mourré]