Native & Naturalized Plants of the Carolinas & Georgia


298

Forb
Winter annual

Non-native: Mediterranean Europe
Documented growing wild in GA NC SC

Common (rare in GA Mountains)

Look for it on roadsides, disturbed areas, per Weakley's Flora

map
To see a detailed map, click here


Invasive?

This plant may be causing problems in natural areas outside its native range, according to authorities such as:

Brooklyn Botanic Garden
Georgia Exotic Pest Plant Council, 2006
Tennessee Exotic Pest Plant Council, 2009

 

full sun ...Variable

LEAVES:
Simple: Unlobed and/or dissected
Basal & alternate

FLOWER:
Spring/Summer
Disc: Blue (sometimes pink, purple or white)
Rays: Absent
Bisexual, fertile (peripheral florets sterile)
Inferior ovary

FRUIT:
Spring/Summer
Bluish-gray
Achene

 

TO LEARN MORE about this plant, look it up in a good book!



Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales

WEAKLEY'S FLORA (11/30/12):
Centaurea cyanus   FAMILY Asteraceae__

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Centaurea cyanus   FAMILY Asteraceae__

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (1968) 179-24-002:
Centaurea cyanus   FAMILY Asteraceae__

 

COMMON NAME:
Bachelor's Buttons, Cornflower


Click or hover over the thumbnails to see larger pictures.

image of Centaurea cyanus

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_cecy2_001_lvd

        

image of Centaurea cyanus

JK Marlow    jkm150327_926

March    Greenville County    SC

Leaves linear, mostly entire, 2-5" long, white-hairy when young, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.

image of Centaurea cyanus

JK Marlow    jkm150327_926b

March    Greenville County    SC

image of Centaurea cyanus

JK Marlow    jkm150327_932

March    Greenville County    SC

image of Centaurea cyanus

Craig Myers    cam_blueflowerkinards

April    Laurens County    SC

Field

image of Centaurea cyanus

Gill Newberry    gn04_c_c_side_view

April        

The involucral bracts have a narrow, dark, fringed margin, per Wildflowers of the Southern Mountains.


click here to see other plants that look similar to this COMPARE involucral bracts of Centaurea

image of Centaurea cyanus

Gill Newberry    gn04_c_cyanus_habitat

April        

image of Centaurea cyanus

Gill Newberry    gn04_c_flower_white

April        

Outer florets have large bilaterally symmetric corollas simulating ray flwrs, per Wildflowers of the Southern Mountains.

image of Centaurea cyanus

Gill Newberry    gn04_c_side_vies

April        

image of Centaurea cyanus

Gill Newberry    gn04_centauea_cropped

April        

Flowers discoid, perfect, or the outer simulating ligules and sterile, per Vascular Flora of the Carolinas.

image of Centaurea cyanus

JK Marlow    jkm0405za_01

May    Greenville County    SC

Field

Marginal florets enlarged, bell-shaped, with sharply pointed segments, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.

image of Centaurea cyanus

Keith Bradley    kab_centaurea_cyanus_0918

May    Polk County    NC

image of Centaurea cyanus

Joseph M. DiTomaso, University of California - Davis, Bugwood.org    bug_5374345

Month Unknown        

image of Centaurea cyanus

Rebekah D. Wallace, University of Georgia, Bugwood.org     bug_5395004

Month Unknown