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Queen Of The Meadow

Eutrochium fistulosum (Barratt) E. E. Lamont

Comments

provided by eFloras
In the field, Eutrochium fistulosum is the most distinct species of the genus; herbarium specimens do not always document the distinguishing characteristics: heights commonly surpassing 2 m, proximal stem diameters usually 2 cm or greater, stems strongly glaucous (mostly hollow, sometimes distally hollow), leaves commonly 6 or 7 per node, arrays of heads commonly 30 × 22 cm.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 475, 478 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Description

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Plants 60–350+ cm. Stems usually purple throughout, sometimes greenish or purple-spotted, hollow proximally, usually glabrous proximally (rarely pubescent toward bases when young), ± glandular-puberulent distally and among heads (glaucous throughout, at least when fresh). Leaves mostly in 4s–6s(–7s); petioles (5–)10–30(–50) mm, glabrous; blades pinnately veined, narrowly to broadly lanceolate, mostly (8–)12–25(–28) × (1.5–)2–6(–9) cm, bases gradually tapered, margins finely serrate (teeth rounded, blunt), abaxial faces sparingly and minutely ± scabrellous to glabrate, adaxial faces glabrous or sparingly puberulent. Heads in convex to rounded (dome-shaped), compound corymbiform arrays (ultimately broadly cylindric). Involucres often purplish, 6.5–9 × 2.5–5 mm. Phyllaries glabrous or outer with hairs on midveins. Florets (4–)5–7; corollas usually pale pinkish or purplish, 4.5–6 mm. Cypselae 3–4.5 mm. 2n = 20.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 475, 478 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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Synonym

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Eupatorium fistulosum Barratt, Eupatoria Verticillata, no. 1. 1841; Eupatoriadelphus fistulosus (Barratt) R. M. King & H. Robinson; Eupatorium purpureum Linnaeus var. angustifolium Torrey & A. Gray
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 475, 478 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Eutrochium fistulosum

provided by wikipedia EN

Eutrochium fistulosum (Eupatorium fistulosum), also called hollow Joe-Pye weed,[3] trumpetweed,[3] or purple thoroughwort,[4] is a perennial North American flowering plant in the sunflower family. It is native to southern Canada and throughout the eastern and south central United States from Maine west to Ontario, Wisconsin, and Missouri and south as far as Florida and Texas.[5] The specific name fistulosum refers to the tubular stem; see fistula.

Eutrochium fistulosum is a herbaceous perennial plant sometimes as much as 350 cm (140 in; 11 ft 6 in) tall. It is found in moist, rich soil alongside ditches and marshes, or in wet forests.[4] It flowers from mid-summer to the first frosts, makes an attractive backdrop in garden plots, and is very attractive to butterflies, bees, and other nectar-feeding insects.[6][7] In addition, it is a larval host to the Clymene moth, eupatorium borer moth, ruby tiger moth, and the three-lined flower moth.[8]

The plant has one simple erect stem, which is green with purple dots or longitudinal dashes and can grow over six feet tall. The upper stems are reddish or purplish. Leaves and primary subdivisions of the flower head appear in whorls of 3–5 (rarely 2 or 6, the rotational symmetry of most plants is consistent). Leaves are large, long and sharply toothed. One plant can produce several flower heads in a branching array, each head with 4-7 pink or purple disc flowers but no ray flowers.[4]

References

  1. ^ "Eutrochium fistulosum (Barratt) E.E.Lamont". The Global Compositae Checklist (GCC). Retrieved 12 May 2015 – via The Plant List.
  2. ^ "Eutrochium fistulosum (Barratt) E.E. Lamont". Tropicos. Missouri Botanical Garden.
  3. ^ a b "Eutrochium fistulosum". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 9 June 2014.
  4. ^ a b c Lamont, Eric E. (2006). "Eutrochium fistulosum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 21. New York and Oxford – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  5. ^ "Eutrochium fistulosum". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  6. ^ Blanchan, Neltje (2005). Wild Flowers Worth Knowing. Project Gutenberg Literary Archive Foundation.
  7. ^ Tew, James Some Ohio Nectar and Pollen Producing Plants Archived 4 October 2006 at the Wayback Machine Ohio State University Extension Factsheet
  8. ^ The Xerces Society (2016), Gardening for Butterflies: How You Can Attract and Protect Beautiful, Beneficial Insects, Timber Press.
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Eutrochium fistulosum: Brief Summary

provided by wikipedia EN

Eutrochium fistulosum (Eupatorium fistulosum), also called hollow Joe-Pye weed, trumpetweed, or purple thoroughwort, is a perennial North American flowering plant in the sunflower family. It is native to southern Canada and throughout the eastern and south central United States from Maine west to Ontario, Wisconsin, and Missouri and south as far as Florida and Texas. The specific name fistulosum refers to the tubular stem; see fistula.

Eutrochium fistulosum is a herbaceous perennial plant sometimes as much as 350 cm (140 in; 11 ft 6 in) tall. It is found in moist, rich soil alongside ditches and marshes, or in wet forests. It flowers from mid-summer to the first frosts, makes an attractive backdrop in garden plots, and is very attractive to butterflies, bees, and other nectar-feeding insects. In addition, it is a larval host to the Clymene moth, eupatorium borer moth, ruby tiger moth, and the three-lined flower moth.

The plant has one simple erect stem, which is green with purple dots or longitudinal dashes and can grow over six feet tall. The upper stems are reddish or purplish. Leaves and primary subdivisions of the flower head appear in whorls of 3–5 (rarely 2 or 6, the rotational symmetry of most plants is consistent). Leaves are large, long and sharply toothed. One plant can produce several flower heads in a branching array, each head with 4-7 pink or purple disc flowers but no ray flowers.

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3-fold symmetry

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4-fold symmetry

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5-fold symmetry

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6-fold (uncommon)

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Stem sections

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