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Symphyotrichum expansum (Poeppig ex Spreng.) G.L. Nesom
Southwestern annual saltmarsh aster

Symphyotrichum expansum
Copyright by: Roger L. Hammer, 2020. A weed growing in an abandoned road bed at Dagny Johnson Key Largo Hammock Botanical State Park, Monroe County, Florida, USA.

Family: Asteraceae

Group: Dicot

Substrate: Terrestrial

Habit: Herb

Perennation: Perennial

Native Range: Southern United States, the West Indies (Greater Antilles), Mexico; perhaps speading as a weed elsewhere.

Map of Florida Locations

SOUTH FLORIDA Occurrence: Present

SOUTH FLORIDA Native Status: Assumed to be Native

South Florida History and Distribution: A weed similar to S. bahamense. Very likely more common than records indicate. Reported by J.K. Small (1913) for Key West.

Synonyms: Aster inconspicuus.

Other data on Symphyotrichum expansum available from :

Atlas of Florida Vascular Plants
Symphyotrichum expansum has been found in the following 2 conservation areas :
Occurrence Native Status
Dagny Johnson Key Largo Hammocks Botanical State Park Present Native
Tropical Park Present Native

Symphyotrichum expansum has been found in the following 3 counties :
Occurrence Native Status
Collier County Native
Miami-Dade County Native
Monroe County (Keys) Native

Symphyotrichum expansum has been found in the following 2 habitats :
Disturbed Upland
Disturbed Wetland

All Images:

Symphyotrichum expansum
Copyright by: Roger L. Hammer, 2020. A weed growing in an abandoned road bed at Dagny Johnson Key Largo Hammock Botanical State Park, Monroe County, Florida, USA.