Eutrochium maculatum
| Spotted joe-pyeweed | |
|---|---|
 | |
| Portage, Michigan | |
Scientific classification  | |
| Kingdom: | Plantae |
| 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] | |
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Synonymy
| |
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][4]
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 also abundant in wetlands.[7][8]
- 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
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Wikimedia Commons has media related to Eutrochium maculatum. |
- 1 2 "Eutrochium maculatum (L.) E.E.Lamont". The Global Compositae Checklist (GCC) – via The Plant List.
- ↑ "Eutrochium maculatum". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 14 January 2018.
- ↑ Eutrochium maculatum, Natural Resources Canada
- 1 2 "Eutrochium maculatum". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
- ↑ 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.
- ↑ "Eutrochium maculatum var. maculatum". New York Flora Association. 2005. Retrieved 2008-09-24.
- 1 2 Lamont, Eric E. (2006). "Eutrochium maculatum". In Flora of North America Editorial Committee. Flora of North America North of Mexico (FNA). 21. New York and Oxford – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
