Centaurea nigra L.
lesser knapweed
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Click on the image below to enlarge it and download a high-resolution
TIFF file.
Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 557. Courtesy of Kentucky Native Plant Society. Scanned by Omnitek Inc. Usage Requirements.
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Images:
Centaurea nigra L.
See all the Centaurea thumbnails at the PLANTS Gallery
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Synonyms:
Centaurea nigra L.
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CENIR |
Centaurea nigra L. var. radiata DC. |
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Distribution:
Centaurea nigra L.
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See U.S. county distributions (when available) by clicking on the map or the linked states below:
USA (CA, CT, DC, DE, IA, ID, IL, IN, KY, MA, MD, ME, MI, MO, MT, NC, NH, NJ, NY, OH, OR, PA, RI, VA, VT, WA, WI, WV), CAN (NB, NF, NS, ON, PE, QC), FRA (SPM) |
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Related Taxa:
Centaurea nigra L.
View
477 genera in Asteraceae,
37 species in Centaurea
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Classification:
Centaurea nigra L.
Click on a scientific name below to expand it in the PLANTS
Classification Report.
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Noxious Weed Information:
Centaurea nigra L.
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place
name to get a complete noxious weed list for that location,
or click here for a composite list of all
Federal and State Noxious Weeds.
Washington: |
black knapweed |
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Class B noxious weed |
black knapweed |
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Noxious weed seed and plant quarantine |
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U.S. Weed Information:
Centaurea nigra L.
black knapweed
This plant can be weedy or invasive according to the authoritative sources noted below. This plant
may be known by one or more common names in different
places, and some are listed above. Click on an acronym
to view each weed list, or click here for a
composite list of Weeds of the U.S.
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Assorted authors.
200_.
State noxious weed lists for 46 states.
State agriculture or natural resource departments.
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Introduced Information:
Centaurea nigra L.
This plant is introduced to some part of the PLANTS
Floristic Area, though it may be native in other parts. Click on
link below for a partial or complete list of PFA introduced plants.
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More Accounts and Images:
Centaurea nigra L.
View photographs from CalPhotos.
View species account from ARS Germplasm Resources Information Network (GRIN).
View taxonomic account from Integrated Taxonomic Information System (ITIS) for ITIS Taxonomic Serial Number 36968.
View species account and distribution map from Jepson Interchange (University of California - Berkeley).
View species account, photographs, and distribution from University of Washington Burke Museum.
View species account and photographs from University of Wisconsin - Stevens Point Freckmann Herbarium.
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Related Web Sites:
Centaurea nigra L.
Botanical.com: A Modern Herbal
Canada-Ontario Noxious Weeds
Eel River Bar First Nation: Control of Black Knapweed: line drawing
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