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Centaurea jacea L.
Brownray knapweed

Life   Plantae   Dicotyledoneae   Asteraceae   Centaurea

Centaurea jacea
© Les Mehrhoff, 2008-2010 · 8
Centaurea jacea

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Centaurea jacea
© Les Mehrhoff, 2008-2010 · 4
Centaurea jacea
Centaurea jacea
© Les Mehrhoff, 2008-2010 · 4
Centaurea jacea

Centaurea jacea
© Les Mehrhoff, 2008-2010 · 4
Centaurea jacea
Centaurea jacea
© Les Mehrhoff, 2008-2010 · 4
Centaurea jacea

Centaurea jacea
© Les Mehrhoff, 2008-2010 · 4
Centaurea jacea
Centaurea jacea
© Les Mehrhoff, 2008-2010 · 3
Centaurea jacea

Associates · map
FamilyScientific name @ source (records)
Andrenidae  Pseudopanurgus parvus @ AMNH_BEE (3)
Apidae  Bombus griseocollis @ AMNH_BEE (1)

Bombus pensylvanicus @ AMNH_BEE (5)

Bombus ternarius @ AMNH_BEE (3)

Ceratina mikmaqi @ AMNH_BEE (2)

Melissodes desponsa @ AMNH_BEE (1)

Melissodes druriella @ AMNH_BEE (2)
Dermateaceae  Pirottaea brevipila @ BPI (2)
Erysiphaceae  Erysiphe cichoracearum @ BPI (7)
Halictidae  Augochlorella aurata @ AMNH_BEE (1)

Halictus ligatus @ AMNH_BEE (1)

Halictus rubicundus @ AMNH_BEE (4)

Lasioglossum paraforbesii @ AMNH_BEE (1)

Lasioglossum perpunctatum @ AMNH_BEE (1)

Lasioglossum pruinosum @ AMNH_BEE (1)

Lasioglossum semicaeruleum @ AMNH_BEE (1)

Lasioglossum versans @ AMNH_BEE (1)
Megachilidae  Megachile brevis @ AMNH_BEE (1)

Megachile centuncularis @ AMNH_BEE (3)

Megachile latimanus @ AMNH_BEE (2)

Megachile mendica @ AMNH_BEE (1)

Megachile relativa @ AMNH_BEE (1)
Mycosphaerellaceae  Cercosporella triboutiana @ BPI (1)

Ramularia centaureae @ BPI (1)

Rhabdospora coriacea @ BPI (2)
Peronosporaceae  Bremia lactucae @ BPI (8)
Phaeosphaeriaceae  Leptosphaeria derasa @ BPI (2)

Leptosphaeria dolioloides @ BPI (2)
Pucciniaceae  Puccinia calcitrapae @ BPI (2)

Puccinia caricis-montanae @ BPI (5)

Puccinia centaureae-caricis @ BPI (3)

Puccinia centaureae @ BPI (61)

Puccinia cnici-oleracei @ BPI (1)

Puccinia hieracii @ BPI (8)

Puccinia jaceae @ 842725A (1); BPI (19); 842725B (1)

Puccinia tenuistipes @ BPI (12)

Puccinia @ BPI (1)

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Centaurea jacea L.
brownray knapweed

Image of Centaurea jacea

General Information
Symbol: CEJA
Group: Dicot
Family: Asteraceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : CAN   I
GL   I
L48   I
Data Source and Documentation
About our new maps
Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   


click on a thumbnail to view an image, or see all the Centaurea thumbnails at the Plants Gallery

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 3: 557. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .




Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae ⁄ Compositae – Aster family
Genus Centaurea L. – knapweed
Species Centaurea jacea L. – brownray knapweed

Subordinate Taxa

This plant has no children

Legal Status

Noxious Weed Information
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 brown knapweed Class B noxious weed brown knapweed, rayed knapweed, brown centaury, horse-knobs, hardheads Noxious weed seed and plant quarantine
U.S. Weed Information
Centaurea jacea brown 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.
STATE Assorted authors. State noxious weed lists for 46 states . State agriculture or natural resource departments.

Wetland Status

Interpreting Wetland Status

North America
Arid West FACU
Atlantic and Gulf Coastal Plain FACU
Eastern Mountains and Piedmont FACU
Great Plains FACU
Midwest FACU
Northcentral & Northeast FACU
Western Mountains, Valleys, and Coast FACU

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (CEJA)
CalPhotos (CEJA)
Integrated Taxonomic Information System (CEJA)
Jepson Interchange (University of California - Berkeley) (CEJA)
University of Wisconsin - Stevens Point Freckmann Herbarium (CEJA)
Related Websites
Canada-Ontario Noxious Weeds (CEJA)
Texas A&M: Vascular Plant Image Gallery (CEJA)



Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

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