Eutrochium maculatum

{{Short description|Species of flowering plant in the family Asteraceae}}

{{Speciesbox

| name = Spotted joe-pyeweed

| image = Flower Buds.JPG

| image_caption = Portage, Michigan

| status = G5

| status_system = TNC

| genus = Eutrochium

| species = maculatum

| authority = (L.) E.E.Lamont

| synonyms_ref = {{ThePlantList |id=gcc-51805 |taxon=Eutrochium maculatum |authority=(L.) E.E.Lamont}}

| synonyms = {{collapsible list|bullets = true

|title=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,{{GRIN | accessdate = 14 January 2018}} is a North American species of flowering plant in the family Asteraceae. It is widespread through much of the United States and Canada.[http://planthardiness.gc.ca/index.pl?lang=en&m=7&speciesid=1004568 Eutrochium maculatum], Natural Resources Canada It is the only species of the genus Eutrochium found west of the Great Plains.{{BONAP |genus=Eutrochium |species=maculatum |date=2014}}

This herbaceous perennial sometimes grows as high as {{convert|2|m|0|abbr=on}}. 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.{{cite book|title=RHS A-Z encyclopedia of garden plants|year=2008|publisher=Dorling Kindersley|location=United Kingdom|isbn=978-1405332965|pages=1136}} The specific name maculatum, meaning spotted, refers to the purple spots on the stem.Dickinson, T.; Metsger, D.; Bull, J.; & Dickinson, R. (2004) ROM Field Guide to Wildflowers of Ontario. Toronto:Royal Ontario Museum, p. 164.

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.{{cite web |title=Eutrochium maculatum var. maculatum |url=http://atlas.nyflora.org/ecology.asp?plantID=6992 |publisher=New York Flora Association |year=2005 |accessdate=2008-09-24 }}{{Dead link|date=August 2019 |bot=InternetArchiveBot |fix-attempted=yes }}{{eFloras|1|250066768|Eutrochium maculatum |tribe=Eupatorieae |first= Eric E. |last=Lamont}}

It is a larval host to the Clymene moth, the eupatorium borer moth, the ruby tiger moth, and the three-lined flower moth.The Xerces Society (2016), Gardening for Butterflies: How You Can Attract and Protect Beautiful, Beneficial Insects, Timber Press. The plant also attracts butterflies and honeybees.{{Cite web|title=Eutrochium maculatum - Plant Finder|url=https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=292659|access-date=2021-11-30|website=www.missouribotanicalgarden.org}}{{Cite web|title=Eutrochium maculatum (Joe-Pye-weed, Queen of the Meadow, Spotted Joe-pye-weed, Spotted Trumpet Weed) {{!}} North Carolina Extension Gardener Plant Toolbox|url=https://plants.ces.ncsu.edu/plants/eutrochium-maculatum/|access-date=2021-11-30|website=plants.ces.ncsu.edu}}