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Eutrochium maculatum - (image 1 of 7)

Taxonomy

Family: Asteraceae

Synonymous with Eupatorium maculatum.

Habitat

Common in marshes. Also characteristic of calcareous fens.

Associates

In fens it grows with Angelica atropurpurea, Caltha palustris, Campanula aparinoides, Cirsium muticum, Pedicularis lanceolata, Sambucus canadensis, Solidago patula, Symplocarpus foetidus.

Distribution

Newfoundland to British Columbia, south to MD, WV, IL, NE, NM, and UT, and near mountains to NC and TN.

Morphology

Herbaceous perennial. Principle stem leaves whorled, 4 to 5 per whorl. Stem purple or purple-spotted, not glaucous. Heads mostly more than 8-flowered. Inflorescences usually flattish.

Notes

Flowers mid June to early October

Wetland indicator: OBL

The heads of this species usually have 10-16+ flowers which distinguishes it from other Eutrochium spp. It can form large stands in mucky wetlands that have been heavily grazed (Swink 341). It is fairly common on the open banks of streams that run through fens. A good plant for naturalizing in moist areas. It is somewhat drought tolerant once established.

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY

Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.

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