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Lateflowering Thoroughwort

Eupatorium serotinum Michx.

Comments

provided by eFloras
Eupatorium serotinum has a wide distribution and is often abundant where it occurs. It includes only sexual, diploid populations. It is known to hybridize with E. perfoliatum. An introduction of E. serotinum in southeastern Ontario apparently is local and may not have persisted.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 463, 465, 466, 467, 468, 470, 471, 472, 473, 474 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America Editorial Committee
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Description

provided by eFloras
Perennials, 50–150+ cm. Stems (from short caudices) single, sparsely to densely branched distally, pubescent throughout (sometimes reddish to purplish). Leaves opposite; petiolate (petioles 10–25 mm); blades ± 3-nerved, lanceolate, 20–90+ × 5–40 mm, bases rounded to slightly oblique, margins entire or serrate, apices acute, faces puberulent, gland-dotted. Heads in corymbiform arrays. Phyllaries 8–12 in 1–2 series, elliptic to oblong, 1–3 × 0.5–1 mm, apices slightly rounded to acute, abaxial faces puberulent, gland-dotted. Florets 9–15; corollas 2.5–3 mm. Cypselae 1–1.5 mm; pappi of 20–30 bristles 2–2.5 mm. 2n = 20.
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: 463, 465, 466, 467, 468, 470, 471, 472, 473, 474 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

Eupatorium serotinum

provided by wikipedia EN

Eupatorium serotinum, also known as late boneset or late thoroughwort, is a fall-blooming herbaceous plant native to North America.[3]

Eupatorium serotinum ranges throughout most of the eastern United States, found in every coastal state from Massachusetts to Texas and inland as far as Minnesota and Nebraska. There are reports of one small population in the Canadian Province of Ontario, and other reports of the species on the south side of the Río Grande in northern Mexico.[3][4][5]

Like other members of the genus Eupatorium, Eupatorium serotinum is about one to two meters (40–80 inches) tall and has inflorescences containing a large number of tiny white flower heads with 9–15 disc florets but no ray florets.[6]

Eupatorium serotinum grows in open sites (either dry or moist), and can hybridize with Eupatorium perfoliatum[3] and other members of the genus Eupatorium. Unlike wind-pollinated plants in this genus, E. serotinum is pollinated by insects.[7]

Eupatorium serotinum.jpg

References

  1. ^ "Eupatorium serotinum". NatureServe Explorer. NatureServe. Retrieved 2022-10-07.
  2. ^ "Eupatorium serotinum Michx.". The Global Compositae Checklist (GCC) – via The Plant List. Note that this website has been superseded by World Flora Online
  3. ^ a b c Siripun, Kunsiri Chaw; Schilling, Edward E. (2006). "Eupatorium serotinum". 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.
  4. ^ Schmidt, Gregory J.; Schilling, Edward E. (2000). "Phylogeny and biogeography of Eupatorium (Asteraceae: Eupatorieae) based on nuclear ITS sequence data". American Journal of Botany. 87 (5): 716–726. doi:10.2307/2656858. JSTOR 2656858. PMID 10811796.
  5. ^ "Eupatorium serotinum". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  6. ^ Siripun, Kunsiri Chaw; Schilling, Edward E. (2006). "Eupatorium". 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.
  7. ^ Victoria I. Sullivan; Joseph Neigel; Bomao Miao (May 1991). "Bias in Inheritance of Chloroplast DNA and Mechanisms of Hybridization between Wind- And Insect-Pollinated Eupatorium (Asteraceae)". American Journal of Botany. 78 (5): 695–705. doi:10.2307/2445090. JSTOR 2445090.
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Wikipedia authors and editors
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Eupatorium serotinum: Brief Summary

provided by wikipedia EN

Eupatorium serotinum, also known as late boneset or late thoroughwort, is a fall-blooming herbaceous plant native to North America.

Eupatorium serotinum ranges throughout most of the eastern United States, found in every coastal state from Massachusetts to Texas and inland as far as Minnesota and Nebraska. There are reports of one small population in the Canadian Province of Ontario, and other reports of the species on the south side of the Río Grande in northern Mexico.

Like other members of the genus Eupatorium, Eupatorium serotinum is about one to two meters (40–80 inches) tall and has inflorescences containing a large number of tiny white flower heads with 9–15 disc florets but no ray florets.

Eupatorium serotinum grows in open sites (either dry or moist), and can hybridize with Eupatorium perfoliatum and other members of the genus Eupatorium. Unlike wind-pollinated plants in this genus, E. serotinum is pollinated by insects.

Eupatorium serotinum.jpg
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cc-by-sa-3.0
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Wikipedia authors and editors
original
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wikipedia EN