Eutrochium maculatum
| Spotted joe-pyeweed | |
|---|---|
 | |
| Portage, Michigan | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Eutrochium |
| Species: | E. maculatum |
| Binomial name | |
| Eutrochium maculatum (L.) E.E.Lamont | |
| Synonyms[1] | |
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Synonymy
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Eutrochium maculatum (spotted joe-pyeweed[2]) is a North American species of flowering plants in the sunflower family. It is widespread through much of the United States and Canada.[3] It is the only species of the genus found west of the Great Plains.[4]
Eutrochium maculatum is an herbaceous perennial sometimes growing 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 binomial name maculatum, meaning spotted, refers to the purple spots on the stem.[6][7]
Spotted Joe-Pye weed 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 so abundant in wetlands.[8][9]
- Eutrochium maculatum var. bruneri (A. Gray) E. E. Lamont - western Canada (British Columbia to Saskatchewan), western USA (Minnesota west to Idaho, south to Arizona + New Mexico)
- Eutrochium maculatum var. foliosum (Fernald) E. E. Lamont - eastern Canada (Newfoundland to Ontario), northern USA (Maine to Minnesota)
- Eutrochium maculatum var. maculatum - eastern Canada (Newfoundland to Ontario), eastern USA (Maine to Minnesota, south to northern Georgia)
References
- 1 2 The Plant List, Eutrochium maculatum (L.) E.E.Lamont
- ↑ "USDA GRIN Taxonomy".
- ↑ Eutrochium maculatum, Natural Resources Canada
- ↑ Biota of North America Program 2014 county distribution map
- ↑ RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964.
- ↑ Dickinson, T.; Metsger, D.; Bull, J.; & Dickinson, R. (2004) ROM Field Guide to Wildflowers of Ontario. Toronto:Royal Ontario Museum, p. 164.
- ↑ Biota of North America Program 2014 county distribution map
- ↑ "Eutrochium maculatum var. maculatum". New York Flora Association. 2005. Retrieved 2008-09-24.
- 1 2 Flora of North America, Eutrochium maculatum (Linnaeus) E. E. Lamont, 2004. Spotted joepyeweed, eupatoire maculée
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