{{Short description|Species of flowering plant}} {{Italic title}} {{Speciesbox |genus = Senecio |species = viscosus |image = Senecio viscosus 15-p.bot-sene.visco-04.jpg |authority = L. |synonyms_ref = <ref name=":powo">{{Cite web |title=''Senecio viscosus'' L. | Plants of the World Online | Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:248231-1#synonyms |access-date=4 December 2024 |website=Plants of the World Online}}</ref> |synonyms = {{Collapsible list|bullets=true |title=Synonymy |''Jacobaea viscosa'' <small>Gilib.</small> |''Obaejaca viscosa'' <small>Cass.</small> |''Senecio vulgaris'' subsp. ''viscosus'' <small>(L.) Bonnier & Layens</small> |''Senecio calvertii'' <small>Boiss.</small> |''Senecio glutinosus'' <small>Schur</small> |''Senecio tymphresteus'' <small>Boiss. & Heldr.</small> |''Seneciunculus viscosus'' <small>Opiz</small> |}} }}
'''''Senecio viscosus''''' is a herbaceous annual plant of the genus ''Senecio''. It is known as the '''sticky ragwort''',<ref name=":USDA" /> '''sticky groundsel''',<ref>{{Cite web |title=''Senecio viscosus'' (Sticky Ragwort): Minnesota Wildflowers |url=https://www.minnesotawildflowers.info/flower/sticky-ragwort |access-date=4 December 2024 |website=Minnesota Wildflowers}}</ref> or '''stinking groundsel'''.<ref>{{Cite EB9|wstitle=Groundsel |volume=11 |page=221}}</ref>
==Description== An annual, growing to 70 cm high and covered with glandular hairs. Very similar to ''Senecio sylvaticus'' which does not have glandular hairs. The outer bracts show a brown tip. The ray-florets are ligulate, yellow and at first spreading then rolled back. The leaves are alternate and deeply lobed. ''Senecio vulgaris'' (Groundsel) does not have ray florets.<ref name="Parnell">Parnell, J. and Curtis, T. 2012. ''Webb's An Irish Flora.'' Cork University Press. {{ISBN|978-185918-478-3}}</ref>
==Distribution== Locally common in Britain and Ireland on waste ground.<ref name="Parnell"/><ref>Martin, W.K. 1965. ''The Concise British Flora in Colour''. Ebury Press</ref><ref>Hackney,P. 1992. ''Stewart & Corry's Flora of the North-east of Ireland.'' Institute of Irish Studies, The Queen's University of Belfast. {{ISBN|0-85389-446-9}}</ref> According to the USDA Plants database, the species has also been introduced in the United States (Pennsylvania, New York, Vermont, New Hampshire, Maine, Massachusetts, Connecticut, Rhode Island, Michigan, Wisconsin, Illinois, Idaho, Alaska) and Canada (British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, New Brunswick, Nova Scotia, Prince Edward Island, and Newfoundland and Labrador).<ref name=":USDA">{{Cite web |title=USDA Plants Database Plant Profile General |url=https://plants.usda.gov/plant-profile/SEVI2 |access-date=4 December 2024 |website=Natural Resources Conservation Service}}</ref>
==Taxonomy== ''Senecio viscosus'' was first named and described by Carl von Linnaeus in 1753 in the book ''Species Plantarum''.<ref>{{Cite web |title=Tropicos | Name - ''Senecio viscosus'' |url=https://www.tropicos.org/name/2701297 |access-date=4 December 2024 |website=Tropicos}}</ref>
==References== {{Reflist}}
==External links== *{{commons inline|Senecio viscosus}} *{{cite EB1911 |wstitle=Groundsel |volume=12 |page=626 |short=x }}
{{Taxonbar|from=Q3503708}}
viscosus Category:Flora of Great Britain Category:Plants described in 1753 Category:Botanical taxa named by Carl Linnaeus Category:Flora of Ireland
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