FNPS Plant Database

Eupatorium rotundifolium

roundleaf thoroughwort, false horehound,
  • Photo by: Shirley Denton, Suncoast Chapter FNPS
  • Photo by: Shirley Denton, Suncoast Chapter FNPS
  • Photo by: Shirley Denton, Suncoast Chapter FNPS

Nomenclature

Common Name:

roundleaf thoroughwort, false horehound,

Synonym(s):

Genus species:

Eupatorium rotundifolium

Family:

Asteraceae (Compositae)

Plant Specifics

Form:

flower

Size:

3-4 ft tall 

Life Span:

Long-lived perennial

Flower Color:

white

Fruit Color:

Phenology:

winter dormant

Noted For:

Showy Flowers

Landscaping

Recommended Uses:

Wildflower garden especially in sunny moist areas.

Considerations:

Said to spread easily from seed to the extent that it can become hard to control.

Availability:

Seed

Propagation:

Seed.

Light:

Full Sun, Part Sun

Moisture Tolerance:

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

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Somewhat moist, no flooding -to- Somewhat long very dry periods

Salt Water Flooding Tolerance:

Unknown

Salt Spray/Salty Soil Tolerance:

Low/no tolerance of salty wind or direct salt spray

Soil or Other Substrate:

Sand, Clay, Loam

Soil pH:

Circumneutral

Suitable to Grow In:

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

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Ecology

Wildlife:

Pollinators, Caterpillars, Birds, Mammals

Attracts many pollinators, especially important for native bees.



  • Birds and other wildlife consume fruit. 


Native Habitats:

Moist flatwoods.

Natural Range in Florida:

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Comments:

Ethnobotany:

General Comments:

Citations:

Huegel, Craig N. (2009-2025). Native Florida Wildflowers (blog). ( http://hawthornhillwildflowers.blogspot.com/ ).


Miller, J.H. and K.V. Miller. (2005). Forest Plants of the Southeast and their Wildlife Uses. The University of Georgia Press, Athens, GA.


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


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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