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Sticky Groundsel

Senecio viscosus L.

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Associations

provided by BioImages, the virtual fieldguide, UK
Foodplant / parasite
uredium of Coleosporium tussilaginis parasitises live Senecio viscosus

In Great Britain and/or Ireland:
Foodplant / parasite
cleistothecium of Golovinomyces cichoracearum var. fischeri parasitises live Senecio viscosus

Foodplant / spot causer
mostly hypophyllous colony of Ramularia anamorph of Ramularia filaris causes spots on live leaf of Senecio viscosus

Foodplant / spot causer
amphigenous colony of Ramularia hyphomycetous anamorph of Ramularia filaris var. filaris causes spots on live leaf of Senecio viscosus

Foodplant / internal feeder
larva of Sphenella marginata feeds within capitulum of Senecio viscosus

Foodplant / sap sucker
Stictopleurus abutilon sucks sap of Senecio viscosus

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Comments

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Senecio viscosus is a smelly, Eurasian weed now widely scattered in areas of cool damp climates, often as a casual waif. The viscid hairs trap wind-blown particles of sand, dust, and soot, which give the surfaces varying textures and colors.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 546, 548, 562 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Description

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Annuals, (10–)20–40(–60) cm (taprooted). Herbage densely fetid-viscid (hairs glandular). Stems single. Leaves evenly distributed; petiolate; blades obovate to oblong (pinnately dissected to pinnatifid), 2–7 × 1.5–4 cm, bases tapered or ± truncate, ultimate margins wavy or crenate-dentate (distal leaves sessile, smaller, ± clasping). Heads (1–)3–8(–30) in irregular, corymbiform arrays. Calyculi of 2–5 bractlets (largest to 4 mm). Phyllaries (± 13) ± 21, 5–7 mm, tips black. Ray florets ± 13; corolla laminae 1–2 mm (usually coiled, scarcely surpassing phyllaries). Cypselae usually glabrous, sometimes hairy. 2n = 40.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 546, 548, 562 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
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eFloras.org
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Senecio viscosus

provided by wikipedia EN

Senecio viscosus is a herbaceous annual plant of the genus Senecio. It is known as the sticky ragwort,[1] sticky groundsel or stinking groundsel.[2]

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.[3]

Distribution

Locally common in Britain and Ireland on waste ground.[3][4][5]

References

  1. ^ USDA, NRCS (n.d.). "Senecio viscosus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 10 November 2015.
  2. ^ Baynes, T. S.; Smith, W. R., eds. (1880). "Groundsel" . Encyclopædia Britannica. Vol. 11 (9th ed.). New York: Charles Scribner's Sons. p. 221.
  3. ^ a b Parnell, J. and Curtis, T. 2012. Webb's An Irish Flora. Cork University Press. ISBN 978-185918-478-3
  4. ^ Martin, W.K. 1965. The Concise British Flora in Colour. Ebury Press
  5. ^ 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

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Senecio viscosus: Brief Summary

provided by wikipedia EN

Senecio viscosus is a herbaceous annual plant of the genus Senecio. It is known as the sticky ragwort, sticky groundsel or stinking groundsel.

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