E-Flora BC: Electronic Atlas of the Flora of British Columbia

Eutrochium maculatum (L.) E.E. Lamont
Joe-pye-weed
Asteraceae (Aster family)

Introduction to Vascular Plants

© Frank Lomer  Email the photographer   (Photo ID #27136)

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Distribution of Eutrochium maculatum
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Species Information

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General:
Perennial herb from a fibrous root; stems solitary, stout, branched in the inflorescence, 60-200 cm tall.
Leaves:
Stem leaves opposite or whorled, mostly in 3's or 4's, lanceolate to lance-elliptic, narrowing abruptly to the stalk, 6-20 cm long and 2-7 cm wide, sharply saw-toothed, lower surfaces covered with spreading, curly hairs.
Flowers:
Heads discoid, clustered in somewhat flat-topped clusters, rarely solitary; involucres 6.5-9 mm tall; involucral bracts graduated, often purplish; disk flowers purple, 9-22, tubular and perfect.
Fruits:
Achenes 5-angled, glandular; pappus of numerous hairlike bristles.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet to moist swamp or pond margins and forest openings in the lowland zone; rare in the lower Fraser Valley; E to NF and S to UT and NM, probably introduced.

Source: The Illustrated Flora of British Columbia

Synonyms and Alternate Names

Eupatorium maculatum L.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References