Eupatorium rotundifolium L. - Round-leaved Thoroughwort


 

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Eupatorium rotundifolium - (image 1 of 4)

 

Taxonomy

Family: Asteraceae

Habitat

Dry woods, occasionally in wet soil.

Associates

 

Distribution

ME to FL, west to southern OH, eastern KY, TN, OK, and TX.

Morphology

Perennial from a short rhizome or crown; stems 30-150 cm, mostly solitary or two; leaves pubescent with spreading, short and soft hairs, often atomiferous-glandular as well, sessile or subsessile, opposite (the upper sometimes alternate), broadly ovate to subrotund, usually evenly toothed, broad-based and trinerved; involucres 4.5-6.5 mm; involucral bracts imbricate, sharply acute to obtuse, villous-puberulent and often atomiferous-glandular as well; flowers 5, white.

Notes

Flowers July to September

Wetland indicator: FAC

Similar to E. pilosum but with much wider leaves.

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

 


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 Michael Hough © 2018