View source for Centaurea macrocephala

{{Treatment/ID
|accepted_name=Centaurea macrocephala
|accepted_authority=Mussin-Puschkin ex Willdenow
|publications={{Treatment/Publication
|title=Sp. Pl., ed. 4 [Willdenow]
|place=3(3): 2298 (-2299). 1803 [Apr-Dec 1803]
}}
|common_names=Globe centaurea;big-head knapweed;yellow bachelor’s button or cornflower;centaurée à gros capitules
|special_status={{Treatment/ID/Special_status
|code=I
|label=Introduced
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Grossheimia macrocephala
|authority=(Mussin-Puschkin ex Willdenow) Sosnowsky & Takhtajan
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Centaurea;Centaurea macrocephala
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Cardueae]]</div><div class="higher-taxon"><small>genus</small>[[Centaurea]]</div><div class="higher-taxon"><small>species</small>[[Centaurea macrocephala]]</div></div>
|volume=Volume 19
|mention_page=page 183
|treatment_page=page 185
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 50–170 cm. <b>Stems</b> usually several, erect, unbranched or sparingly branched distally, villous with septate hairs, thinly arachnoid-tomentose, fistulose proximal to heads. <b>Leaves</b> short-villous and thinly arachnoid, ± glabrate, resin-gland-dotted; basal and proximal cauline petiolate, blades oblanceolate to narrowly ovate, 10–30 cm, margins entire or shallowly dentate; cauline sessile, shortly decurrent, not much smaller except those crowded proximal to heads, blades lanceolate to ovate, 5–10 cm, entire, often ± undulate, apices acute. <b>Heads</b> disciform or weakly radiant, borne singly, sessile, closely subtended by clusters of reduced leaves. <b>Involucres</b> ovoid to hemispheric, 25–35 mm. <b>Phyllaries</b>: bodies pale green or stramineous, ovate or broadly lanceolate, glabrous, appendages erect to spreading, brown, scarious, abruptly expanded, 1–2 cm wide, ± covering phyllary bodies, lacerate fringed, sometimes tipped by weak spines 1–2 mm, glabrous. <b>Florets</b> many; corollas yellow; corollas of sterile florets slightly expanded, ca. 4 mm; corollas of disc florets ca. 3.5 mm. <b>Cypselae</b> 7–8 mm; pappi of many setiform scales (“flattened bristles”), 5–8 mm. <b>2n</b> = 18 (Russia).</span><!--

-->{{Treatment/Body
|phenology=Flowering summer (Jun–Sep).
|habitat=Garden escape in meadows, grassy clearings
|elevation=400–2000 m
|distribution=Ont.;Que.;Colo.;Mich.;Wash.;Wis.;e Europe;w Asia.
|introduced=true
|discussion=<p>Although <i>Centaurea macrocephala</i> is cultivated as an ornamental and for cut flowers in many areas, it has been declared a noxious weed by the state of Washington because of its potential status as an invader.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Centaurea macrocephala
|authority=Mussin-Puschkin ex Willdenow
|rank=species
|parent rank=genus
|synonyms=Grossheimia macrocephala
|basionyms=
|family=Asteraceae
|phenology=Flowering summer (Jun–Sep).
|habitat=Garden escape in meadows, grassy clearings
|elevation=400–2000 m
|distribution=Ont.;Que.;Colo.;Mich.;Wash.;Wis.;e Europe;w Asia.
|introduced=true
|reference=None
|publication title=Sp. Pl., ed. 4 [Willdenow]
|publication year=
|special status=Introduced
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V19_209.xml
|tribe=Asteraceae tribe Cardueae
|genus=Centaurea
|species=Centaurea macrocephala
}}<!--

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[[Category:Treatment]]
[[Category:Centaurea]]
[[Category:Revised Since Print]]