Eupatorium compositifoliumWalter

yankeeweed

WFO wfo-0000005073 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Eupatorium compositifolium, photographed by Mark Richman
fig. a Mark Richman, CC BY 4.0 / 2022-03-31 / obs. 185552218
Eupatorium compositifolium, photographed by Cleveland Powell
fig. b Cleveland Powell, CC BY 4.0 / obs. 167605948
Eupatorium compositifolium, photographed by Judy Gallagher
fig. c Judy Gallagher, CC BY-SA 4.0 / obs. 164420935
Eupatorium compositifolium, photographed by Annika Lindqvist
fig. d Annika Lindqvist, CC BY 4.0 / obs. 162352887
Eupatorium compositifolium, photographed by Ben Machado
fig. e Ben Machado, CC BY 4.0 / obs. 112977313
Eupatorium compositifolium, photographed by Brandon Corder
fig. f Brandon Corder, CC BY 4.0 / obs. 108098825
Eupatorium compositifolium, photographed by Michael W Belitz
fig. g Michael W Belitz, CC0 1.0 / obs. 111247176
Eupatorium compositifolium, photographed by Becky Dill
fig. h Becky Dill, CC0 1.0 / obs. 99507998

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 13 botanical countries

Regions where Eupatorium compositifolium is native: Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, Virginia AlabamaArkansasFloridaGeorgiaKentuckyLouisianaMississippiNorth CarolinaOklahomaSouth CarolinaTennesseeTexasVirginia
Native distribution of Eupatorium compositifolium, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Alabama ALA NORTHERN AMERICA
Arkansas ARK
Florida FLA
Georgia GEO
Kentucky KTY
Louisiana LOU
Mississippi MSI
North Carolina NCA
Oklahoma OKL
South Carolina SCA
Tennessee TEN
Texas TEX
Virginia VRG

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 70 in flower of 114 examined

Peak flowering in Oct. Each bar is the share of Eupatorium compositifolium observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 70 of 114 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 7 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Where it actually grows measured, from 1,162 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low 1.9 °C 7.4 °C 12.1 °C
Warmest month, mean daily high 30.0 °C 31.9 °C 34.9 °C
Annual rainfall 925 mm 1,333 mm 1,710 mm
Rainfall in the driest quarter 169 mm 217 mm 347 mm

It is found where winters are cool but frost is light or absent. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 1,162 research-grade observations of Eupatorium compositifolium that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 6 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Chrysocoma artemisiifolia Poepp. ex Steud.
  • Chrysocoma coronopifolia (Willd.) Michx.
  • Chrysocoma coronopifolia Michx.
  • Eupatorium coronopifolium Willd.
  • Eupatorium racemosum Bertol.
  • Traganthes compositifolia Greene

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.