Compilation
Onopordum illyricum

21 Images see all

Previous
Next

Name

Identification
Onopordum illyricum L. [family ASTERACEAE ] (stored under name); Verified by J. Müller (JE), Onopordum illyricum L. [family ASTERACEAE ] Verified by J. Müller (JE),
Related name
  • Onopordum libanoticum
  • Onopordum setensis
  • Onopordum teddianum
  • Onopordum cynarocephalum
  • Onopordum illyricum
  • Onopordum tauricum
  • Onopordum acanthium
  • Onopordon not on sheet
Common name
  • Illyrian thistle, Flora of North America Vol. 19

Flora

Entry for Onopordum illyricum Linnaeus [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 19,
Names
Onopordum illyricum Linnaeus [family COMPOSITAE], Sp. Pl., 2: 827. 1753
Treatment Author(s)
David J. Keil
Information
Plants 50–250 cm, herbage canescent-tomentose throughout. Stems: wings 0.5–2 cm wide. Leaves 10–50 cm, margins shallowly to ± deeply 1–2-pinnatifid with 8–10 pairs of triangular lobes. Heads mostly borne singly at branch tips. Involucres 30–60 mm diam (excluding spines) ± spheric, bases truncate to concave. Phyllaries lanceolate to ovate, bases 3–8 mm wide, glabrous or ± cobwebby-tomentose, spines to 5 mm. Corollas purple, 25–35 mm. Cypselae 4–5 mm; pappi of many whitish, plumose bristles 10–12 mm. 2n = 34 (France).
Phenology
jun-aug (summer)
Altitude range
200–500 m;
Distribution
s Europe (Mediterranean region)introduced in Australia.USA Calif.
Discussion
Illyrian thistle is considered to be a noxious weed in California where efforts to eradicate it from the state’s flora have been implemented. This species has also invaded rangelands in Australia, where it is introduced.
Native/Introduced
introduced;

Related Materials