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Floristic Inventory of the Florida Keys Database Online

Helianthus debilis Nutt. subsp. debilis
East Coast dune sunflower

Helianthus debilis
Copyright by: Roger L. Hammer

Family: Asteraceae

Group: Dicot

Substrate: Terrestrial

Habit: Herb

Perennation: Perennial

Native Range: Eastern peninsular Florida and southeastern Georgia; doubtfully native to the Monroe County Keys.


Map of select IRC data for peninsular Florida

SOUTH FLORIDA Occurrence: Present

SOUTH FLORIDA Native Status: Native

SOUTH FLORIDA Cultivated Status: Cultivated

Comments: Visit our Natives For Your Neighborhood website for more information and images. See a 2019 post on the Treasure Coast Natives blog on why sunflowers bend.

FLORIDA KEYS Occurrence: Present

FLORIDA KEYS Native Status: Doubtfully Native

Map of select IRC data for the Florida Keys

Florida Keys History and Distribution: Reported in 1913 by John Kunkel Small for pinelands and sand dunes from the upper Keys to the lower Keys, but there are no other historical reports or herbarium specimens to support this.  The few known populations appear to be spreading or persisting from cultivated plants.

Other data on Helianthus debilis subsp. debilis available from :

Helianthus debilis subsp. debilis has been reported for the following 2 habitats in THE FLORIDA KEYS :
Beach Dune
Disturbed Upland

All Images:

Helianthus debilis
Copyright by: Roger L. Hammer

Helianthus debilis
Copyright by: George D. Gann

Helianthus debilis
Copyright by: Keith A. Bradley