Eupatorium altissimum

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Eupatorium altissimum
Eupa alti.jpg
Photo by Jennifer Anderson, hosted by the USDA-NRCS PLANTS Database
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida – Dicotyledons
Order: Asterales
Family: Asteraceae ⁄ Compositae
Genus: Eupatorium
Species: E. altissimum
Binomial name
Eupatorium altissimum
EUPA ALTI dist.jpg
Natural range of Eupatorium altissimum from USDA NRCS Plants Database.

Common name: Tall thoroughwort

Taxonomic notes


A description of Eupatorium altissimum is provided in The Flora of North America.


It is seen as far noth as CT; stretches south to Florida, and to Texas. [1] It is mostly seen in the midwest on limestone substrates, but uncommon east of the mountains. [1]



It is found in woodlands, old fields, woodland edges, and openings over mafic rocks or calcareous rocks. [1] It is also found in roadside ditches. [2]


E. altissimum has been observed flowering in July and September.[3][2] Flowers from August to November according to Weakley (2015).

Conservation and management

Cultivation and restoration

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 Weakley, Alan S. Flora of the Southern and Mid-Atlantic States: Working Draft of 21 May 2015. University of North Carolina Herbarium (NCU). PDF. 1120.
  2. 2.0 2.1 Florida State University Robert K. Godfrey Herbarium database. URL: Last accessed: June 2014. Collectors: R. Kral. States and Counties: Florida: Liberty.
  3. Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. Accessed: 9 DEC 2016