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Argythamnia blodgettii (Torr.) Chapm.
Blodgett’s wild mercury, Blodgett’s silverbush

Argythamnia blodgettii
Copyright by: Craig van der Heiden
In habitat, Monroe County

Family: Euphorbiaceae

Group: Dicot

Substrate: Terrestrial

Habit: Herb

Perennation: Perennial

Native Range: Endemic to South Florida in Miami-Dade and Monroe counties.

Map of select IRC data for peninsular Florida

NatureServe Global Status: Imperiled

United States Federal Status: Threatened

State of Florida Status: Endangered

Florida Natural Areas Inventory State Status: Imperiled

IRC SOUTH FLORIDA Status: Imperiled

SOUTH FLORIDA Occurrence: Present

SOUTH FLORIDA Native Status: Native

South Florida History and Distribution: This is very rare in South Florida, known only from the Miami Rock Ridge and the Florida Keys. Using modern NatureServe criteria, we re-ranked this to Imperiled in South Florida in July, 2018.

SOUTH FLORIDA Cultivated Status: Cultivated

Comments: For a current review of A. blodgettii throughout its range, see the U.S. Fish and Wildlife Species Profile. See also, IRC’s report Vascular plant species of management concern in Everglades National Park (Gann 2015), page 162, Florida Natural Areas Inventory's Field Guide to the Rare Plants of Florida page (Chafin 2000) and our Natives For Your Neighborhood website.

Synonyms: Aphora blodgettii, Ditaxis blodgettii.

Other data on Argythamnia blodgettii available from :

Argythamnia blodgettii has been found in the following 24 conservation areas :
Occurrence Native Status
Biscayne National Park Possibly Extirpated Possibly Extirpated
Blue Heron Hammock, Florida Keys Wildlife and Environmental Area Present Native
Camp Owaissa Bauer Present Native
Camp Owaissa Bauer Addition Present Native
Castellow Hammock parcel 28 Possibly Extirpated Possibly Extirpated
Castellow Hammock parcel 33 Assumed to be Present Native
Castellow Hammock Park Present Native
Deering Estate at Cutler Present Native
Dove Creek Hammocks, Florida Keys Wildlife and Environmental Area Present Native
Everglades National Park Present Native
Fuchs Hammock Preserve Present Native
George N. Avery Pineland Present Native
Hattie Bauer Hammock Possibly Extirpated Possibly Extirpated
John Kunkel Small Pineland Present Native
John Pennekamp Coral Reef State Park Reported
Larry and Penny Thompson Park Present Native
Lignumvitae Key Botanical State Park Present Native
Lignumvitae Key Botanical State Park, Klopp Tract Present Native
Long Key State Park Present Native
National Key Deer Refuge Present Native
Ned Glenn Nature Preserve Present Native
Pine Ridge Sanctuary Present Native
Snake Creek Hammocks, Florida Keys Wildlife and Environmental Area Present Native
Windley Key Fossil Reef Geological State Park Present Native

Argythamnia blodgettii has been found in the following 2 counties :
Occurrence Native Status
Miami-Dade County Native
Monroe County (Keys) Native

Argythamnia blodgettii has been found in the following 4 habitats :
Disturbed Upland
Keys Cactus Barren
Pine Rockland
Rockland Hammock

All Images:

Argythamnia blodgettii
Copyright by: Craig van der Heiden
In habitat, Monroe County
Argythamnia blodgettii
Copyright by: Michelle M. Smith, 2018
In habitat, Ned Glenn Nature Preserve, Florida
Argythamnia blodgettii
Copyright by: Keith A. Bradley
Argythamnia blodgettii
Copyright by: Michelle M. Smith, 2018
In habitat, Ned Glenn Nature Preserve, Florida
Argythamnia blodgettii
Copyright by: Michelle M. Smith, 2018
In habitat, Ned Glenn Nature Preserve, Florida
Argythamnia blodgettii
Copyright by: Michelle M. Smith, 2018
In habitat, Ned Glenn Nature Preserve, Florida
Argythamnia blodgettii
Copyright by: Alexander Blochel, 2018
In habitat, George N. Avery Pineland, Florida
Argythamnia blodgettii
Copyright by: Roger L. Hammer
Argythamnia blodgettii
Copyright by: Shirley Denton
Argythamnia blodgettii
Copyright by:
Argythamnia blodgettii
Copyright by: Shirley Denton