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{{Short description|Species of sunflower}}
{{taxobox
{{Speciesbox
|image = Helianthus occidentalis compressed.JPG
|image = Helianthus occidentalis compressed.JPG
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|genus = Helianthus
|regnum = [[Plantae]]
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|species = occidentalis
|unranked_divisio = [[Angiosperms]]
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|authority = [[John Leonard Riddell|Riddell]]
|unranked_classis = [[Eudicots]]
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|synonyms_ref = <ref name=i>{{ThePlantList |id=gcc-128112 |taxon=Helianthus occidentalis}}</ref>
|unranked_ordo = [[Asterids]]
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|synonyms = *''Helianthus dowellianus'' <small>M.A.Curtis</small>
|ordo = [[Asterales]]
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*''Helianthus illinoensis'' <small>Gleason</small> <ref>[http://www.tropicos.org/ImageFullView.aspx?imageid=30266 photo of herbarium specimen at Missouri Botanical Garden, collected in Illinois in 1904, type specimen of ''Helianthus illinoensis'', syn of ''Helianthus occidentalis'']</ref>
|familia = [[Asteraceae]]
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}}
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|genus = ''[[Helianthus]]''
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|species = '''''H. occidentalis'''''
|binomial = ''Helianthus occidentalis''
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|binomial_authority = [[John Leonard Riddell|Riddell]]
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|synonyms_ref=<ref name=i>{{ThePlantList |id=gcc-128112 |taxon=Helianthus occidentalis}}</ref>
⚫
|synonyms=*''Helianthus dowellianus'' <small>M.A.Curtis</small>
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*''Helianthus illinoensis'' <small>Gleason</small> <ref>[http://www.tropicos.org/ImageFullView.aspx?imageid=30266 photo of herbarium specimen at Missouri Botanical Garden, collected in Illinois in 1904, type specimen of ''Helianthus illinoensis'', syn of ''Helianthus occidentalis']</ref>
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|}}


'''''Helianthus occidentalis''''' ('''fewleaf sunflower''' or '''western sunflower''')<ref name=r/> is a [[species]] of [[Helianthus|sunflower]] native to the Eastern and Central United States. It grows mostly in the [[Great Lakes Region]] and in the [[Ozarks]], with additional populations scattered as far as [[Massachusetts]], [[Texas]], and the [[Florida Panhandle]].<ref>{{BONAP|ref |genus=Helianthus |species=occidentalis}}</ref>
'''''Helianthus occidentalis''''', the '''fewleaf sunflower''' or '''western sunflower''',<ref name=r/> is a [[species]] of [[Helianthus|sunflower]] native to the Eastern and Central United States. It grows mostly in the [[Great Lakes Region]] and in the [[Ozarks]], with additional populations scattered as far as [[Massachusetts]], [[Texas]], and the [[Florida Panhandle]].<ref>{{BONAP|ref |genus=Helianthus |species=occidentalis}}</ref>


''H. occidentalis'' differs from other, similar species by its sparse leaves, most of which are crowded around the lower part of the stem. This [[perennial]] plant reaches heights from 2 to 5&nbsp;ft (60–150&nbsp;cm). It produces one to several yellow [[flower heads]], each with 8-14 [[ray florets]] surrounding more than 50 [[disc floret]]s.<ref name=r>{{eFloras|1|242416636|Helianthus occidentalis |tribe=Heliantheae |first=Edward E. |last=Schilling}}</ref>
''Helianthus occidentalis'' differs from other, similar species by its sparse leaves, most of which are crowded around the lower part of the stem. This [[perennial]] plant reaches heights from 2 to 5&nbsp;ft (60–150&nbsp;cm). It produces one to several yellow [[flower heads]], each with 8-14 [[ray florets]] surrounding more than 50 [[disc floret]]s.<ref name=r>{{eFloras|1|242416636|Helianthus occidentalis |tribe=Heliantheae |first=Edward E. |last=Schilling}}</ref>


The word ''occidentalis'' means "western" in Latin. The plant was first described in 1836, when the Great Lakes Region was considered the western part of the United States.<ref>Riddell, John Leonard 1836. Western Journal of the Medical and Physical Sciences 9(36): 577</ref><ref>{{Tropicos|2700857|Helianthus occidentalis}}</ref>
The word ''occidentalis'' means "western" in Latin. The plant was first described in 1836, when the Great Lakes Region was considered the western part of the United States.<ref>{{cite journal |last=Riddell |first=John Leonard |date=1836 |journal=Western Journal of the Medical and Physical Sciences |volume=9 |issue=36 |page=577}}</ref><ref>{{Tropicos|2700857|Helianthus occidentalis}}</ref>


;Subspecies<ref name=i/><ref name=r/>
;Subspecies<ref name=i/><ref name=r/>
*''H. o.'' subsp. ''occidentalis'' - most of species range
*''Helianthus occidentalis'' subsp. ''occidentalis'' - most of species range
*''H. o.'' subsp. ''plantagineus'' <small>(Torr. & A.Gray) Shinners</small> - Texas, [[Arkansas]]
*''Helianthus occidentalis'' subsp. ''plantagineus'' <small>(Torr. & A.Gray) Shinners</small> - Texas, [[Arkansas]]


==References==
==References==
{{Reflist}}
{{Reflist}}

== External links ==
* {{Missouri Plants |color=Yellow |leaf=opp |genus=Helianthus |species=occidentalis |link=1}}
* [http://wisplants.uwsp.edu/scripts/detail.asp?SpCode=HELOCCsOCC Robert W. Freckmann Herbarium, UW - Stevens Point]


{{Taxonbar|from=Q5704883}}
{{Taxonbar|from=Q5704883}}

Latest revision as of 18:21, 2 December 2023

Helianthus occidentalis
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Helianthus
Species:
H. occidentalis
Binomial name
Helianthus occidentalis
Synonyms[2]
  • Helianthus dowellianus M.A.Curtis
  • Helianthus illinoensis Gleason [1]

Helianthus occidentalis, the fewleaf sunflower or western sunflower,[3] is a species of sunflower native to the Eastern and Central United States. It grows mostly in the Great Lakes Region and in the Ozarks, with additional populations scattered as far as Massachusetts, Texas, and the Florida Panhandle.[4]

Helianthus occidentalis differs from other, similar species by its sparse leaves, most of which are crowded around the lower part of the stem. This perennial plant reaches heights from 2 to 5 ft (60–150 cm). It produces one to several yellow flower heads, each with 8-14 ray florets surrounding more than 50 disc florets.[3]

The word occidentalis means "western" in Latin. The plant was first described in 1836, when the Great Lakes Region was considered the western part of the United States.[5][6]

Subspecies[2][3]
  • Helianthus occidentalis subsp. occidentalis - most of species range
  • Helianthus occidentalis subsp. plantagineus (Torr. & A.Gray) Shinners - Texas, Arkansas

References[edit]

  1. ^ photo of herbarium specimen at Missouri Botanical Garden, collected in Illinois in 1904, type specimen of Helianthus illinoensis, syn of Helianthus occidentalis
  2. ^ a b "Helianthus occidentalis". The Global Compositae Checklist (GCC) – via The Plant List. Note that this website has been superseded by World Flora Online
  3. ^ a b c Schilling, Edward E. (2006). "Helianthus occidentalis". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 21. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  4. ^ "Helianthus occidentalis". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  5. ^ Riddell, John Leonard (1836). Western Journal of the Medical and Physical Sciences. 9 (36): 577. {{cite journal}}: Missing or empty |title= (help)
  6. ^ "Helianthus occidentalis". Tropicos. Missouri Botanical Garden.


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