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Image of wood groundsel, heather groundsel
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Wood Groundsel, Heather Groundsel

Senecio sylvaticus L.

Associations

provided by BioImages, the virtual fieldguide, UK
In Great Britain and/or Ireland:
Foodplant / parasite
sporangium of Bremia lactucae parasitises live leaf of Senecio sylvaticus
Other: unusual host/prey

Foodplant / parasite
uredium of Coleosporium tussilaginis parasitises live Senecio sylvaticus

Foodplant / parasite
Golovinomyces cichoracearum var. fischeri parasitises live Senecio sylvaticus

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

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

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Comments

provided by eFloras
Senecio sylvaticus is a Eurasian weed that favors cool, wet climates. It is well established in coastal areas of the Pacific Coast and in parts of Newfoundland and Quebec; elsewhere in the flora, it appears to be sporadic.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 548, 563 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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Description

provided by eFloras
Annuals, (15–)30–80+ cm (tap­roots fibrous-rooted). Herbage puberulent (hairs abundant, curly). Stems single. Leaves evenly distributed; petiolate; blades obovate to oblong, 3–7(–12) × 1–3(–4) cm, usually 1–2-pinnate, bases tapered, ultimate margins dentate (distal leaves similar, clasping, bractlike). Heads 12–24 in corymbiform arrays. Calyculi 0 or of 1–5+ linear to filiform bractlets. Phyllaries ± 13 (± 21), 4–7+ mm, tips greenish or minutely black. Ray florets 0 or 1–8+; corolla laminae usually 1–2+ mm (barely surpassing phyllaries). Cypselae hairy (especially on angles). 2n = 40.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 548, 563 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Senecio sylvaticus

provided by wikipedia EN

Senecio sylvaticus is a species of flowering plant in the aster family. It is variously known as the woodland ragwort,[1] heath groundsel,[2] or mountain common groundsel.[3] It is native to Eurasia, and it can be found in other places, including western and eastern sections of North America, as an introduced species and an occasional roadside weed. It grows best in cool, wet areas. It is an annual herb producing a single erect stem up to 80 centimeters tall from a taproot. It is coated in short, curly hairs. The toothed, deeply lobed leaves are up to 12 centimeters long and borne on petioles. They are evenly distributed along the stem. The inflorescence is a wide, spreading array of many flower heads, each lined with green- or black-tipped phyllaries. The heads contain yellow disc florets and most have very tiny yellow ray florets as well.

References

  1. ^ USDA, NRCS (n.d.). "Senecio sylvaticus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 10 November 2015.
  2. ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
  3. ^ Baynes, T. S.; Smith, W. R., eds. (1880). "Groundsel" . Encyclopædia Britannica. Vol. 11 (9th ed.). New York: Charles Scribner's Sons. p. 221.

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Senecio sylvaticus: Brief Summary

provided by wikipedia EN

Senecio sylvaticus is a species of flowering plant in the aster family. It is variously known as the woodland ragwort, heath groundsel, or mountain common groundsel. It is native to Eurasia, and it can be found in other places, including western and eastern sections of North America, as an introduced species and an occasional roadside weed. It grows best in cool, wet areas. It is an annual herb producing a single erect stem up to 80 centimeters tall from a taproot. It is coated in short, curly hairs. The toothed, deeply lobed leaves are up to 12 centimeters long and borne on petioles. They are evenly distributed along the stem. The inflorescence is a wide, spreading array of many flower heads, each lined with green- or black-tipped phyllaries. The heads contain yellow disc florets and most have very tiny yellow ray florets as well.

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