Spotted joe-pyeweed
Portage, Michigan

Secure  (NatureServe)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Eutrochium
Species:
E. maculatum
Binomial name
Eutrochium maculatum
(L.) E.E.Lamont
Synonyms[1]
Synonymy
  • Eupatorium maculatum L.
  • Eupatorium purpureum subsp. maculatum (L.) Á.Löve & D.Löve
  • Eupatorium purpureum var. maculatum (L.) Voss
  • Eupatorium trifoliatum var. maculatum (L.) Farw.
  • Eupatoriadelphus maculatus (L.) R.M.King & H.Rob.
  • Eupatorium maculatum f. eresinatum Lepage
  • Eupatorium maculatum var. urticifolium Barratt ex Alph.Wood
  • Eupatorium purpureum var. maculatum (L.) Darl.
  • Eupatoriadelphus maculatus var. bruneri (A.Gray) R.M.King & H.Rob., syn of var. bruneri
  • Eupatorium maculatum var. bruneri (A.Gray) Breitung, syn of var. bruneri
  • Eupatorium maculatum subsp. bruneri (A.Gray) G.W.Douglas, syn of var. bruneri
  • Eupatorium purpureum var. bruneri (A.Gray) B.L.Rob., syn of var. bruneri
  • Eupatorium trifoliatum var. bruneri (A.Gray) Farw., syn of var. bruneri
  • Eupatorium bruneri var. foliosum (Fernald) House, syn of var. foliosum
  • Eupatorium maculatum var. foliosum (Fernald) Wiegand, syn of var. foliosum
  • Eupatorium purpureum var. foliosum Fernald, syn of var. foliosum
  • Eupatorium trifoliatum var. foliosum (Fernald) Farw., syn of var. foliosum

Eutrochium maculatum, the spotted joe-pyeweed,[2] is a North American species of flowering plant in the family Asteraceae. It is widespread through much of the United States and Canada.[3] It is the only species of the genus Eutrochium found west of the Great Plains.[4]

This herbaceous perennial sometimes grows as high as 2 m (6 ft 7 in). Stems are sometimes completely purple, sometimes green with purple spots. One plant can produce numerous rose-purple flower heads in late summer, each head with 8-22 disc flowers but no ray flowers.[5] The specific name maculatum, meaning spotted, refers to the purple spots on the stem.[6][4]

Spotted joe-pyeweed thrives in marshes, rich fens and swamps. It also does well in man-made moist expanses such as ditches, seepage areas and wet fields. Above all else the plant flourishes in the non-shaded environments that are also abundant in wetlands.[7][8]

It is a larval host to the Clymene moth, the eupatorium borer moth, the ruby tiger moth, and the three-lined flower moth.[9] The plant also attracts butterflies and honeybees.[10][11]

Varieties

The following varieties are known:[1][8]

Cultivars

The following cultivars are recipients of the Royal Horticultural Society's Award of Garden Merit (listed under the synonym Eupatorium maculatum):-

  • (Atropurpureum Group) 'Orchard Dene' [12]
  • (Atropurpureum Group) 'Purple Bush' [13]
  • (Atropurpureum Group) 'Riesenschirm' [14]
Ottawa, Ontario

References

  1. 1 2 "Eutrochium maculatum (L.) E.E.Lamont". The Global Compositae Checklist (GCC) – via The Plant List. Note that this website has been superseded by World Flora Online
  2. ↑ "Eutrochium maculatum". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 14 January 2018.
  3. ↑ Eutrochium maculatum, Natural Resources Canada
  4. 1 2 "Eutrochium maculatum". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  5. ↑ RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 978-1405332965.
  6. ↑ Dickinson, T.; Metsger, D.; Bull, J.; & Dickinson, R. (2004) ROM Field Guide to Wildflowers of Ontario. Toronto:Royal Ontario Museum, p. 164.
  7. ↑ "Eutrochium maculatum var. maculatum". New York Flora Association. 2005. Retrieved 2008-09-24.
  8. 1 2 Lamont, Eric E. (2006). "Eutrochium maculatum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 21. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  9. ↑ The Xerces Society (2016), Gardening for Butterflies: How You Can Attract and Protect Beautiful, Beneficial Insects, Timber Press.
  10. ↑ "Eutrochium maculatum - Plant Finder". www.missouribotanicalgarden.org. Retrieved 2021-11-30.
  11. ↑ "Eutrochium maculatum (Joe-Pye-weed, Queen of the Meadow, Spotted Joe-pye-weed, Spotted Trumpet Weed) | North Carolina Extension Gardener Plant Toolbox". plants.ces.ncsu.edu. Retrieved 2021-11-30.
  12. ↑ "Eupatorium maculatum (Atropurpureum Group) 'Orchard Dene'". RHS. Retrieved 23 June 2020.
  13. ↑ "Eupatorium (Atropurpureum Group) 'Purple Bush'". RHS. Retrieved 23 June 2020.
  14. ↑ "Eupatorium maculatum (Atroput]rpureum Group) 'Riesenschirm'". RHS. Retrieved 23 June 2020.

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