Onopordum acaulon L.

Stemless Onopordum

Sp. Pl., edn 2, 2: 1159 (1763) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Strongly taprooted, rosetted annual or biennial to 1 m diam.; stems absent. Leaves oblanceolate to elliptic in outline, to 50 cm long and 12 cm wide, pinnatifid to pinnatisect with triangular lobes, ultimate lobes tipped by a yellow spine, both surfaces white-woolly or white-tomentose; petiole short, flat. Capitula sessile or on peduncles to 3 cm long, solitary or clustered at centre of rosette, subglobose, 4–6 cm diam.; involucral bracts ovate-lanceolate, 2–3 cm long, all erect or outer ones reflexed, tapered into a spinose apical appendage, green. Florets shorter than involucre, usually white. Cypselas 4–5 mm long, 4-ribbed, wrinkled, brown or grey; pappus 2–3 cm long, cream. Flowers mostly Oct.–Nov.

*DunT, *LoM, *MuF, *MuM, *MSB, *NIS, *RobP, *VRiv, *Wim. Also naturalised WA, SA, NSW. Native to Spain and France. Scattered widely through the north-west of the State, often on roadsides, wasteland and pastures. Declared a noxious weed in Victoria.

Source: Jeanes, J.A. (1999). Asteraceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne.
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Asteranae
order Asterales
family Asteraceae
genus Onopordum
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Onopordum acaulon in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Onopordum acaulon in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present naturalised
Murray Mallee present naturalised
Wimmera present naturalised
Victorian Riverina present naturalised
Murray Scroll Belt present introduced
Robinvale Plains present naturalised
Murray Fans present naturalised
Dundas Tablelands present introduced
Northern Inland Slopes present naturalised

State distribution

Distribution map
Western Australia
South Australia
New South Wales