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Tall joe-pye weed

Also known as: tall boneset

Eupatorium altissimum L.

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Tall joe-pye weed
Tall joe-pye weed
Tall joe-pye weed inflorescence
Tall joe-pye weed flower heads
Tall joe-pye weed
Tall joe-pye weed
Tall joe-pye weed
Tall joe-pye weed achene bristles

Morphology

Stem
Erect, slender, 1 to several, much-branched, soft-hairy above, nearly glabrous below.
Leaves
Opposite, numerous, simple, short-stalked to sessile, narrowly lanceolate, 2 to 5 inches long, 1/2 to 1 inch wide, gray-green, densely soft-hairy, glandular-dotted, 3-veined beneath; margins toothed, particularly above middle; tips sharply pointed.
Inflorescence
Panicle-like clusters, broad, many-flowered, terminal.
Flower
Heads cylindric, about 1/4 inch tall; bracts lanceolate, overlapping, tips rounded or blunt; ray florets absent; disk florets 5, corollas white.
Fruit
Achenes, small, angled, blackish, tipped with whitish bristles, enclosing small seed.

Ecology

Habitat
Dry, open areas, old fields, open woodlands, thickets, roadsides, and disturbed sites.
Distribution
East 1/2 of Kansas.

Additional Notes

Comments

According to New England tradition, Joe Pye was a Native American who treated spotted fever with species of Eupatorium. Large stands of tall joe-pye weed often indicate overgrazing. It is the most frequently encountered Eupatorium in Kansas.

Special Notes: Tall bonset has opposite leaves while false boneset Brickellia eupatorioides has alternate leaves. They are occasionally mistaken for one another.
Quick Facts
Plant Type
Wildflower
Family
Asteraceae - Sunflower Family
Life Span
Perennial
Height
3-6 feet
Last Updated
2007-09-14
Color Groups
White, Green & Greenish White Wildflowers
Flowering Period
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Blooms: August, September, October