Senecio jacobaea L.

Ragwort

Sp. Pl. 870 (1753) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Glabrous or sparsely pubescent biennial or short-lived perennial, to c. 1.5 m high. First year leaves basally rosetted, petiolate, ovate in outline, to c. 20 cm long, subentire, pinnatisect or bipinnatissect; stem leaves sessile, often auriculate, c. ovate in outline, 6–15 cm long, 3–8 cm wide, deeply pinnatisect, the lobes variably lacerated, lower lobes often distant. Inflorescence showy, corymbose, up to c. 30 cm across; capitula numerous, radiate; involucre cup-shaped to campanulate, 3.5–5 mm long, glabrous or sparsely cobwebbed at base; bracts 11–13, black-tipped; bracteoles present. Ray florets 10–15, bright yellow, ligules 4–10 mm long; disc florets 30–50, yellow. Cypselas obloid, c. 2 mm long, pale brown, those of ray florets glabrous, those of disc florets with short, blunt subappressed hairs in rows; pappus of slender white hairs 4–5 mm long, tardily deciduous Flowers Dec.–Mar.

*GipP, *Gold, *HSF, *OtP, *OtR, *Strz, *VVP, *WaP, *Wim. Also naturalised SA, Tas., New Zealand, Canada, South Africa, Americas. Native to Europe. Widespread and locally abundant in cooler, high-rainfall parts of the State, principally in agricultural regions. A declared noxious weed, known to cause death by liver damage in stock.

Source: Walsh, N.G. (1999). Senecio. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne.
Updated by: Daniel Ohlsen, 2017-05-31
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Asteranae
order Asterales
family Asteraceae
genus Senecio
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Senecio jacobaea in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Senecio jacobaea in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present introduced
Victorian Volcanic Plain present naturalised
Gippsland Plain present naturalised
Otway Plain present naturalised
Warrnambool Plain present naturalised
Goldfields present introduced
Highlands-Southern Fall present naturalised
Otway Ranges present naturalised
Strzelecki Ranges present naturalised

State distribution

Distribution map
State
Western Australia
South Australia
New South Wales
Victoria
Tasmania