Solidago macrophylla

{{Short description|Species of flowering plant}}

{{Speciesbox

| image = Solidago macrophylla 6.jpg

| genus = Solidago

| species = macrophylla

| authority = Banks ex Pursh 1813 not Schloss. & Vuk. 1869 nor Bigel. 1824

| synonyms_ref = [http://www.theplantlist.org/tpl1.1/record/gcc-104424 The Plant List, Solidago macrophylla Banks ex Pursh ]

| synonyms =

• Aster thyrsoideus (E.Mey.) Kuntze
• Solidago mensalis Fernald
• Solidago thyrsoidea E.Mey.

}}

Solidago macrophylla, the largeleaf goldenrod{{PLANTS|id=SOMA4|taxon=Solidago macrophylla|accessdate=19 November 2015}} or large-leaved goldenrod, is North American species of herbaceous perennial plants of the family Asteraceae. It is native to eastern and central Canada (from Ontario to Newfoundland & Labrador) and the north-eastern United States (New York and New England).[http://bonap.net/MapGallery/State/Solidago%20macrophylla.png Biota of North America Program 2014 county distribution map][https://gobotany.nativeplanttrust.org/species/solidago/macrophylla/ Go Botany, New England Wildflower Society] Some of the populations in Québec and Labrador lie north of the Arctic Circle.[http://nhm2.uio.no/paf/86#paf-860106 Pan-Arctic Flora, Solidago macrophylla Banks ex Pursh]

Solidago macrophylla is a perennial herb up to 105 cm (42 inches) tall, with a thick woody rhizome. Leaves can be up to 15 cm (6 inches) long. One plant can produce 110 or more small yellow flower heads, mostly on short side branches.[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250067556 Flora of North America, Solidago macrophylla Banks ex Pursh, 1813. Large-leaved goldenrod , verge d’or à grandes feuilles ]