|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Generally biennial, coarse. Stem: spiny-winged. Leaf: basal and cauline, alternate, dentate to deeply pinnately lobed, very spiny. Inflorescence: heads discoid, 1--7, in cyme-like clusters; involucre 3--7 cm diam, (hemi)spheric; phyllaries many, in 8--10+ series, spine-tipped, outer generally spreading or reflexed; receptacle epaleate, deeply pitted. Flower: many; corolla (nearly) radial, white to purple, tube slender, lobes linear; anther base acutely tailed, tips awl-shaped; style tip with minutely hairy distal node, terminal appendage +- entire, long, cylindric, minutely papillate. Fruit: +- cylindric, 4--5-angled, glabrous, generally +- cross-roughened, brown to gray-black, mottled; pappus bristles many, barbed or plumose, fused at base.
Species In Genus: +- 40 species: Eurasia, Mediterranean. Etymology: (Greek: name for cotton thistle)
eFlora Treatment Author: David J. Keil & Charles E. Turner
Jepson Online Interchange
Key to OnopordumPrevious taxon: Oncosiphon piluliferum
Next taxon: Onopordum acanthium subsp. acanthium
Citation for this treatment: David J. Keil & Charles E. Turner 2016. Onopordum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=537, accessed on October 21, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on October 21, 2016.