Difference between revisions of "Centaurea nigra"
Sp. Pl. 2: 911. 1753.
FNA>Volume Importer |
FNA>Volume Importer |
||
| Line 12: | Line 12: | ||
|name=Centaurea jacea subsp. nigra | |name=Centaurea jacea subsp. nigra | ||
|authority=(Linnaeus) Bonnier & Layens | |authority=(Linnaeus) Bonnier & Layens | ||
| + | |rank=subspecies | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Centaurea nemoralis | |name=Centaurea nemoralis | ||
|authority=Jordan | |authority=Jordan | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Centaurea;Centaurea nigra | |hierarchy=Asteraceae;Asteraceae tribe Cardueae;Centaurea;Centaurea nigra | ||
| Line 32: | Line 34: | ||
|discussion=<p>Black knapweed is listed as a noxious weed in Colorado and Washington.</p> | |discussion=<p>Black knapweed is listed as a noxious weed in Colorado and Washington.</p> | ||
|tables= | |tables= | ||
| − | |references= | + | |references= |
| − | |||
| − | |||
| − | |||
}}<!-- | }}<!-- | ||
| Line 42: | Line 41: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Centaurea nigra | name=Centaurea nigra | ||
| − | |||
|authority=Linnaeus | |authority=Linnaeus | ||
|rank=species | |rank=species | ||
| Line 54: | Line 52: | ||
|distribution=St. Pierre and Miquelon;B.C.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Calif.;Conn.;Del.;Idaho;Ill.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Mo.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Pa.;R.I.;Vt.;Va.;Wash.;W.Va.;Wis.;Europe. | |distribution=St. Pierre and Miquelon;B.C.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;P.E.I.;Que.;Calif.;Conn.;Del.;Idaho;Ill.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Mo.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Pa.;R.I.;Vt.;Va.;Wash.;W.Va.;Wis.;Europe. | ||
|introduced=true | |introduced=true | ||
| − | |reference= | + | |reference=None |
|publication title=Sp. Pl. | |publication title=Sp. Pl. | ||
|publication year=1753 | |publication year=1753 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V19_212.xml |
|tribe=Asteraceae tribe Cardueae | |tribe=Asteraceae tribe Cardueae | ||
|genus=Centaurea | |genus=Centaurea | ||
Revision as of 19:17, 16 December 2019
Perennials, 30–150 cm. Stems 1–few, erect or ascending, openly branched distally, villous to scabrous with septate hairs and loosely tomentose, ± glabrate. Leaves: basal and proximal cauline petiolate, blades oblanceolate or elliptic, 5–25 cm, margins entire or shallowly dentate to irregularly pinnately lobed; distal cauline sessile, not decurrent, gradually smaller, blades linear to lanceolate, entire or dentate. Heads discoid, in few-headed corymbiform arrays, borne on leafy-bracted peduncles. Involucres ovoid to campanulate or hemispheric, 15–18 mm, usually ± as wide as high. Principal phyllaries: bodies lanceolate to ovate, loosely tomentose or glabrous, bases usually ± concealed by expanded appendages, appendages erect, overlapping, dark brown to black, flat, margins pectinately dissected into numerous wiry lobes. Inner phyllaries: tips truncate, irregularly dentate or lobed. Florets 40–100+, all fertile; corollas purple (rarely white), 15–18 mm. Cypselae tan, 2.5–3 mm, finely hairy; pappi of many blackish, unequal, sometimes deciduous bristles 0.5–1 mm. 2n = 22, 44.
Phenology: Flowering summer–fall (Jun–Oct).
Habitat: Roadsides, fields, clearings, waste areas
Elevation: 0–300 m
Distribution
St. Pierre and Miquelon, B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Calif., Conn., Del., Idaho, Ill., Iowa, Ky., Maine, Md., Mass., Mich., Mo., Mont., N.H., N.J., N.Y., Ohio, Oreg., Pa., R.I., Vt., Va., Wash., W.Va., Wis., Europe.
Discussion
Black knapweed is listed as a noxious weed in Colorado and Washington.
Selected References
None.