Eutrochium

Taxobox
name = Joe-Pye weeds


image_width = 200px
image_caption = Joe-Pye weed in flower
regnum = Plantae
divisio = Magnoliophyta
unranked_classis = eudicot
ordo = Asterales
familia = Asteraceae
tribus = Eupatorieae
genus = "Eutrochium"
genus_authority = Rafinesque
subdivision_ranks = Species
subdivision = "E. dubium"
"E. fistulosum"
"E. maculatum"
"E. purpureum"
"E. steelei"
synonyms ="Eupatoriadelphus"

"Eutrochium" is a genus of herbaceous flowering plants in Asteraceae. This plant is commonly referred to as "Joe-Pye Weed". They are native from Eastern North America and have non-dissected foliage and pigmented flowers. It includes all the purple flowering North American species of the genus "Eupatorium" as traditionally defined. [Siripun & Schilling (2006)] "Eupatorium" has recently undergone some revision and has been broken up into smaller genera. [Ito "et al." (2000), Schmidt & Schilling (2006)] "Eutrochium" is the senior synonym of "Eupatoriadelphus". [Lamont (2004, 2006)] "Eupatorium" in the revised sense (about 42 species of white-flowered plants from the temperate Northern hemisphere) is apparently a close relative of "Eutrochium". "Eupatorium" and "Eutrochium" are both placed in the subtribe Eupatoriinae, but South American plants which have sometimes been placed in that subtribe, such as "Stomatanthes", seem to belong elsewhere in the tribe Eupatorieae. [Schmidt & Schilling (2006)]

The taxa that belong to "Eutrochium" are: [Lamont (2006)]
* "Eutrochium dubium" (Willdenow ex Poiret) E. E. Lamont – Coastal Plain Joe-Pye Weed
* "Eutrochium fistulosum" (Barratt) E. E. Lamont – Hollow Joe-Pye Weed
* "Eutrochium maculatum" (Linnaeus) E. E. Lamont – Spotted Joe-Pye Weed [http://plants.bees.net/gallery/view_photo.php?set_albumName=asteraceae&id=Photo_Eupatorium_maculatum_342A_7_30_01_Home]
** "Eutrochium maculatum" var. "bruneri" (A. Gray) E. E. Lamont
** "Eutrochium maculatum" var. "foliosum" (Fernald) E. E. Lamont
** "Eutrochium maculatum" var. "maculatum"
* "Eutrochium purpureum" (Linnaeus) E. E. Lamont – Sweet Joe-Pye Weed, Green-stemmed Joe-Pye Weed, Queen of the Meadow, Gravel Root, Kidney Root, Purple Boneset
** "Eutrochium purpureum" var. "holzingeri" (Rydberg) E. E. Lamont
** "Eutrochium purpureum" var. "purpureum"
* "Eutrochium steelei" (E. E. Lamont) E. E. Lamont

Footnotes

References

* (2000): Phylogeny and Phytogeography of "Eupatorium" (Eupatorieae, Asteraceae): Insights from Sequence Data of the nrDNA ITS Regions and cpDNA RFLP. "Journal of Plant Research" 113(1): 79-89. doi|10.1007/PL00013913 (HTML abstract)
* (2004): New combinations in "Eutrochium", an earlier name for "Eupatoriadelphus". "Sida" 21: 901-902.
* (2006): [http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=112473 393. "Eutrochium" Rafinesque] . "In: Flora of North America North of Mexico", Vol. 21 (Magnoliophyta: Asteridae, part 8: Asteraceae, part 3): 461-462, 474-475. ISBN 0195305654
* (2000): Phylogeny and biogeography of "Eupatorium" (Asteraceae: Eupatorieae) based on nuclear ITS sequence data. "Am. J. Bot." 87(5): 716-726. PMID 10811796 [http://www.amjbot.org/cgi/reprint/87/5/716.pdf PDF fulltext]
* (2006): [http://www.amjbot.org/cgi/content/full/93/2/319 Molecular confirmation of the hybrid origin of "Eupatorium godfreyanum" (Asteraceae)] . "Am. J. Bot." 93(2): 319-325. [http://www.amjbot.org/cgi/reprint/93/2/319.pdf PDf fulltext]