FNPS Plant Database

Euthamia spp.

Flattop goldenrod
  • Photo by: Ginny Stibolt, Ixia Chapter FNPS
  • Photo by: Eleanor Dietrich, Magnolia Chapter FNPS

Nomenclature

Common Name:

Flattop goldenrod

Synonym(s):

Euthamia caroliniana, Euthamia graminifolia

Genus species:

Euthamia spp.

Family:

Asteraceae (Compositae)

Plant Specifics

Form:

flower

Size:

1.5-3 ft

Life Span:

Long-lived perennial

Flower Color:

yellow

Fruit Color:

Phenology:

Blooms late summer through fall. Winter dormant.

Noted For:

Showy Flowers

Landscaping

Recommended Uses:

Retain for its value to insects in meadows and along roadsides and paths.

Considerations:

Availability:

Seed

Propagation:

Seed

Light:

Moisture Tolerance:

Always Flooded---------------------------------Extremely Dry

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Usually moist, occasional inundation -to- Very long very dry periods

Salt Water Flooding Tolerance:

Unknown

Salt Spray/Salty Soil Tolerance:

Some tolerance to salty wind but not direct salt spray

Soil or Other Substrate:

Soil pH:

Circum-neutral

Suitable to Grow In:

USDA zones are based on the average annual extreme minimum winter temperature.

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Ecology

Wildlife:

Pollinators, Butterflies

Attracts bees, beetles, and butterflies. A special value for native bees.  Important fall nectar source.

Native Habitats:

Flatwoods, marsh edges, ruderal areas.

Natural Range in Florida:

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Comments:

Ethnobotany:

General Comments:

E. caroliniana is the more common species. Though not typically planted, both are worthy of retention for their value to pollinating insects.

Citations:

North Carolina State Extension. (Undated). North Carolina Extension Gardener Plant Toolbox. ( https://plants.ces.ncsu.edu/ ). North Carolina Agricultural & Technical University, Greensboro, NC.


Pinellas County Extension. (2010). What's in Bloom: Flat-top Goldenrod. ( https://blogs.ifas.ufl.edu/pinellasco/2010/11/05/whats-in-bloom-flat-top-goldenrod/. Accessed 2026. Institute for Food and Agricultural Sciences, University of Florida, Gainesville.


Virtual UCF Herbarium. (2017). Slender Flattop Goldenrod ( Euthamia caroliniana ). ( https://virtual.arboretum.ucf.edu/slender-flattop-goldenrod/ ). Accessed 2026. University of Central Florida, Orlando.

Wunderlin, R. P., B. F. Hansen, A. R. Franck, and F. B. Essig. (1999+). Atlas of Florida Plants. ( https://florida.plantatlas.usf.edu/ ). [S. M. Landry and K. N. Campbell (application development), USF Water Institute.] Institute for Systematic Botany, University of South Florida, Tampa.

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