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Genus Onopordum Family Asteraceae

Description: Spiny annual or biennial herbs; hairs short and mealy or woolly.

Leaves basal or cauline, alternate, margins toothed to pinnatisect; sessile, auriculate to stem-clasping.

Heads terminal, solitary or clustered; involucral bracts several-seriate, unequal, rigid, herbaceous, spinose; receptacles flat, naked, bases of achenes in pits with dentate margins. All florets tubular, bisexual, fertile; corolla glabrous or glandular, 5-lobed, purple to pink or white. Anthers caudate at base, apex subulate, filaments hairy. Style branches linear, erect, appressed.

Achenes 4- or 5-angled; pappus of numerous, 1–several-seriate, barbellate or plumose bristles fused in a ring at the base.


Herbarium
Sheet

Distribution and occurrence: World: 40 species, Europe, western Asia, & northern Africa. Australia: 3 or 4 species (naturalized), all States except Qld & N.T.

Text by L. Murray
Taxon concept:

Taxa not yet included in identification key
Onopordum myriacanthium

 Key to the species 
1Stem absent; florets whiteOnopordum acaulon
Stem present, erect; florets purple2
2Stem with several branches; spines yellowOnopordum acanthium
Stem unbranched below inflorescence; spines dark
                       Back to 1
Onopordum illyricum

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