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|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: Annual to perennial herb. Stem: prostrate to erect, generally +- branched, generally ribbed, occasionally winged. Leaf: basal and cauline, alternate; proximal generally 1--2-pinnately lobed; distal generally +- reduced. Inflorescence: heads disciform or radiant (discoid); involucre cylindric to hemispheric; phyllaries graduated in 6--many series, generally +- ovate, scarious-margined, tip appendages fringed to spiny; receptacle flat, epaleate, long-bristly. Flower: corolla white to pink, purple, or yellow, tube long, distally bent; outer flowers generally sterile, corolla 3--10-lobed, +- bilateral, reduced, inconspicuous or expanded and spreading, +- ray-like; inner flowers bisexual, corolla +- radial; anther base tailed, tip oblong; style tip cylindric, minutely hairy distal to hairy ring, branches very short. Fruit: +- barrel-shaped, +- compressed, attached +- at side; pappus 0 or generally of stiff, unequal bristles or narrow scales.
Species In Genus: +- 500 species: especially Eurasia, northern Africa; some cultivated. Etymology: (Greek: plant name associated with Chiron, a centaur) Note: Many noxious or invasive weeds. Centaurea nigrescens Willd. not naturalized.
eFlora Treatment Author: David J. Keil
Jepson Online Interchange
Key to CentaureaPrevious taxon: Carthamus tinctorius
Next taxon: Centaurea benedicta
Citation for this treatment: David J. Keil 2016. Centaurea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=367, accessed on September 26, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on September 26, 2016.