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Species of flowering plant in the family Asteraceae From Wikipedia, the free encyclopedia
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]
| Spotted joe-pyeweed | |
|---|---|
| |
| Portage, Michigan | |
Scientific 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
| |
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]
The following varieties are known:[1][8]
The following cultivars are recipients of the Royal Horticultural Society's Award of Garden Merit (listed under the synonym Eupatorium maculatum):-
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