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Panicum maximum Jacq.
Guineagrass

Panicum maximum
Copyright by: George D. Gann, 2016
Naturalized at Piñones State Forest, Loíza, Puerto Rico Enlarge

Family: Poaceae

Group: Monocot

Substrate: Terrestrial

Habit: Herb

Perennation: Perennial

Map of Florida Locations

FLEPPC Status: Category II Invasive

SOUTH FLORIDA Occurrence: Present

SOUTH FLORIDA Native Status: Not Native, Naturalized

SOUTH FLORIDA Cultivated Status: Not Cultivated

Comments: For more images, click on the Atlas of Vascular Plants link below.

Other data on Panicum maximum available from :

Panicum maximum has been found in the following 117 conservation areas :
Occurrence Native Status
A.D. 'Doug' Barnes Park Present Not Native, Naturalized
Alice C. Wainwright Park Present Not Native, Naturalized
Arch Creek Addition Present Not Native, Naturalized
Arch Creek Park Present Not Native, Naturalized
Attwood Addition, Indian Key Historic State Park Present Not Native, Naturalized
Big and Little George Hammocks Present Not Native, Naturalized
Big Cypress National Preserve Present Not Native, Naturalized
Bill Baggs Cape Florida State Park Present Not Native, Naturalized
Biscayne National Park Present Not Native, Naturalized
Black Creek Forest Present Not Native, Naturalized
Blazingstar Preserve Present Not Native, Naturalized
Caloosahatchee Creeks Preserve Present Not Native, Naturalized
Caloosahatchee Regional Park Present Not Native, Naturalized
Camp Owaissa Bauer Present Not Native, Naturalized
Castellow Hammock parcel 28 Present Not Native, Naturalized
Castellow Hammock parcel 31 Present Not Native, Naturalized
Castellow Hammock parcel 33 Present Not Native, Naturalized
Castellow Hammock Park Present Not Native, Naturalized
Chapman Field Park Present Not Native, Naturalized
Chernoff Hammock Present Not Native, Naturalized
Coral Reef Park Present Not Native, Naturalized
County Line Scrub, Miami-Dade County Present Not Native, Naturalized
Crocodile Lake National Wildlife Refuge Present Not Native, Naturalized
Crystal Lake Sand Pine Scrub Natural Area Present Not Native, Naturalized
Curry Hammock State Park Present Not Native, Naturalized
Dagny Johnson Key Largo Hammocks Botanical State Park Present Not Native, Naturalized
Daskas Present Not Native, Naturalized
Deering Estate at Cutler Present Not Native, Naturalized
Delray Beach Municipal Beach Present Not Native, Naturalized
Delray Beach, Lake Ida parcel Present Not Native, Naturalized
Delray Oaks Natural Area Present Not Native, Naturalized
Dolphin Center and Dolphin Center Addition Present Not Native, Naturalized
Doris Davis Forman Wilderness Preserve Natural Area Present Not Native, Naturalized
Dove Creek Hammocks, Florida Keys Wildlife and Environmental Area Present Not Native, Naturalized
Dry Tortugas National Park Present Not Native, Naturalized
Dupuis Reserve Present Not Native, Naturalized
Estero Bay Preserve State Park Present Not Native, Naturalized
Everglades and Francis S. Taylor Wildlife Management Area Present Not Native, Naturalized
Everglades National Park Present Not Native, Naturalized
Fakahatchee Strand Preserve State Park Present Not Native, Naturalized
Fern Forest Nature Center Present Not Native, Naturalized
Fisheating Creek Wildlife Management Area Present Not Native, Naturalized
Florida Atlantic University Ecological Site Present Not Native, Naturalized
Florida City Pineland Present Not Native, Naturalized
Frenchman's Forest Natural Area Present Not Native, Naturalized
Frog Pond/L-31 N Transition Lands Present Not Native, Naturalized
Fuchs Hammock Preserve Present Not Native, Naturalized
Gomez Present Not Native, Naturalized
Grassy Waters Preserve Present Not Native, Naturalized
Harden Hammock Present Not Native, Naturalized
Hattie Bauer Hammock Present Not Native, Naturalized
Hawk's Hammock Park Present Not Native, Naturalized
Hobe Sound National Wildlife Refuge Present Not Native, Naturalized
Hobe Sound Sandhill Present Not Native, Naturalized
Hugh Taylor Birch State Park Present Not Native, Naturalized
Ingram Pineland Present Not Native, Naturalized
Ives Estate Park Present Not Native, Naturalized
J.W. Corbett Wildlife Management Area Present Not Native, Naturalized
John Kunkel Small Pineland Present Not Native, Naturalized
John Pennekamp Coral Reef State Park Present Not Native, Naturalized
Jonathan Dickinson State Park Present Not Native, Naturalized
Juno Dunes Natural Area Present Not Native, Naturalized
Jupiter Ridge Natural Area Present Not Native, Naturalized
Kendall Indian Hammocks Park Present Not Native, Naturalized
Key West National Wildlife Refuge Possibly Extirpated Not Native, Naturalized
Kiplinger Present Not Native, Naturalized
Koreshan State Historic Site Present Not Native, Naturalized
LaBelle Nature Park Present Not Native, Naturalized
Larry and Penny Thompson Park Present Not Native, Naturalized
Lignumvitae Key Botanical State Park, Klopp Tract Present Not Native, Naturalized
Long Key Natural Area & Nature Center Present Not Native, Naturalized
Loveland Hammock Present Not Native, Naturalized
Loxahatchee Slough Natural Area Present Not Native, Naturalized
Lucille Hammock Present Not Native, Naturalized
Ludlam Pineland Present Not Native, Naturalized
Matheson Hammock Park Present Not Native, Naturalized
Meissner Hammock Present Not Native, Naturalized
Military Trail Natural Area Present Not Native, Naturalized
Miramar Pineland Present Not Native, Naturalized
National Key Deer Refuge Present Not Native, Naturalized
Navy Wells Pineland #23 Present Not Native, Naturalized
Navy Wells Pineland Preserve Present Not Native, Naturalized
Nixon Smiley Pineland Addition Present Not Native, Naturalized
Northrop Pineland Present Not Native, Naturalized
Palm Drive Pineland Present Not Native, Naturalized
Pal-Mar Present Not Native, Naturalized
Pine Island Ridge Natural Area Present Not Native, Naturalized
Pine Jog Environmental Sciences Center Present Not Native, Naturalized
Porter-Russell Pineland Present Not Native, Naturalized
Prairie Pines Preserve Present Not Native, Naturalized
Quail Roost Pineland Present Not Native, Naturalized
R. Hardy Matheson Preserve Present Not Native, Naturalized
Riverbend Park Present Not Native, Naturalized
Rock Pit #39 Present Not Native, Naturalized
Rockdale Pineland Present Not Native, Naturalized
Rocky Point Hammock Present Not Native, Naturalized
Rolling Oaks Park Present Not Native, Naturalized
Rookery Bay National Estuarine Research Reserve Present Not Native, Naturalized
Rosemary Scrub Natural Area Present Not Native, Naturalized
Royal Palm Beach Pines Natural Area Present Not Native, Naturalized
Savannas Preserve State Park Present Not Native, Naturalized
Seabranch Preserve State Park Present Not Native, Naturalized
Seacrest Scrub Natural Area Present Not Native, Naturalized
Secret Woods Nature Center Present Not Native, Naturalized
Serenoa Glade Preserve Present Not Native, Naturalized
Silver Palm Groves Present Not Native, Naturalized
Snake Creek Hammocks, Florida Keys Wildlife and Environmental Area Present Not Native, Naturalized
St. Lucie Inlet Preserve State Park Present Not Native, Naturalized
Sunny Palms Pineland Present Not Native, Naturalized
Trinity Pineland Present Not Native, Naturalized
Virginia Key Beach Park and Marine Stadium Present Not Native, Naturalized
Warbler Wetland Natural Area Present Not Native, Naturalized
West Biscayne Pineland Present Not Native, Naturalized
Windley Key Fossil Reef Geological State Park Present Not Native, Naturalized
Yamato Scrub Natural Area Present Not Native, Naturalized
Yellow Fever Creek Preserve Present Not Native, Naturalized
Zoo Miami Present Not Native, Naturalized

Panicum maximum has been found in the following 10 counties :
Occurrence Native Status
Broward County Not Native, Naturalized
Charlotte County Not Native, Naturalized
Collier County Not Native, Naturalized
Hendry County Not Native, Naturalized
Lee County Not Native, Naturalized
Martin County Not Native, Naturalized
Miami-Dade County Not Native, Naturalized
Monroe County (Keys) Not Native, Naturalized
Monroe County (Mainland) Not Native, Naturalized
Palm Beach County Not Native, Naturalized

Panicum maximum has been found in the following 12 habitats :
Coastal Strand
Disturbed Upland
Disturbed Wetland
Maritime Hammock
Mesic Flatwoods
Mesic Hammock
Pine Rockland
Rockland Hammock
Scrub
Scrubby Flatwoods
Shell Mound
Xeric Hammock

All Images:

Panicum maximum
Copyright by: George D. Gann, 2016
Naturalized at Piñones State Forest, Loíza, Puerto Rico Enlarge
Panicum maximum
Copyright by: Keith A. Bradley
Panicum maximum
Copyright by: George D. Gann, 2017
Naturalized in southern Brazil
Panicum maximum
Copyright by: Shirley Denton
Panicum maximum
Copyright by: James Johnson, 2014
In habitat, Miramar Pineland Natural Area,
Broward County, Florida