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Hollow-Stemmed JoePye Weed
Eutrochium fistulosum (Barratt) E.E. Lamont
(formerly Eupatorium fistulosum Barratt)
Asteraceae (Sunflower Family)
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Eutrochium fistulosum
(Barratt) E.E. Lamont.,
Hollow-Stemmed Joe-Pye Weed (formerly
Eupatorium
fistulosum Barratt.):
(Bayer Code:
EUPFI; US Code EUFI14)
·
U.S.
native simple perennial with hollow, purple (or green with purple spots)
generally hairless stems that can grow 2-7 feet tall; stem branching can be from
base, but more in upper ½ to 1/3 of stem
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Leaves are in whorls of 4-6 at nodes, lanceolate, with toothed margins
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Head inflorescences are born in large panicles at tips of stems (panicles can be
up to 18 inches tall and 12 inches wide)
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Individual flower heads are about 0.25 inch diameter, with 5-7 pink , dusty-pink
to purplish disk flowers (no ray flowers)
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Bracts below inflorescence are in multiple layers, oval, green at base to pink
at tips; tips are round-pointed
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Flowering time is from mid-summer to early fall
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Prefers moist, fertile soils in meadows, pastures,
prairies, along ditches, marshes, streambanks; is also widely-planted as a
rain-garden, wetland prairie plant, or as an ornamental in landscapes,
wildflower areas
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May be toxic if overgrazed, but a favorite of butterflies
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Similar species include:
o
Sweet
Joe-Pye Weed (Eutrochium
purpureum) has mostly solid stems, but flowers are more lilac, pink or
whitish, and flower heads have 4-6 disk flowers
o
Spotted Joe-Pye Weed
(Eutrochium maculatum) has
mostly solid stems, but flowers heads are more flattened, leaves a lighter green
and flower heads have 8-20 disk flowers