Senecio viscosus is a herbaceous annual plant of the genus Senecio. It is known as the sticky ragwort, sticky groundsel, or stinking groundsel.
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.Parnell, J. and Curtis, T. 2012. Webb's An Irish Flora. Cork University Press.
Distribution Locally common in Britain and Ireland on waste ground.Martin, W.K. 1965. The Concise British Flora in Colour. Ebury PressHackney,P. 1992. Stewart & Corry's Flora of the North-east of Ireland. Institute of Irish Studies, The Queen's University of Belfast. 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).
Taxonomy Senecio viscosus was first named and described by Carl von Linnaeus in 1753 in the book Species Plantarum.
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