OF THE CAROLINAS & GEORGIA

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

WEAKLEY'S FLORA (11/30/12):
Cirsium arvense   FAMILY Asteraceae__   NEW! Click to go to FSUS key


SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Cirsium arvense   FAMILY Asteraceae__

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-25-013:
Carduus arvensis   FAMILY Asteraceae__

 

COMMON NAME:
Canada Thistle, Field Thistle


         To see larger pictures, click or hover over the thumbnails.

image of Cirsium arvense, Canada Thistle, Field Thistle

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_ciar4_001_lvd

        

image of Cirsium arvense, Canada Thistle, Field Thistle

USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide    pnd_ciar4_009_lvd

        

image of Cirsium arvense, Canada Thistle, Field Thistle

JK Marlow    jkm060712_059

July    Tazewell County    VA

Roadside

Numerous small heads (0.5"-0.75") in a branched inflorescence, per Wildflowers of the Southern Mountains.

image of Cirsium arvense, Canada Thistle, Field Thistle

JK Marlow    jkm060712_060

July    Tazewell County    VA

Roadside

image of Cirsium arvense, Canada Thistle, Field Thistle

JK Marlow    jkm060712_063

July    Tazewell County    VA

Roadside

image of Cirsium arvense, Canada Thistle, Field Thistle

JK Marlow    jkm060712_066

July    Tazewell County    VA

Roadside

image of Cirsium arvense, Canada Thistle, Field Thistle

JK Marlow    s060711_a

July    Tazewell County    VA

Roadside

image of Cirsium arvense, Canada Thistle, Field Thistle

Leslie Dietz, Bugwood.org    bug_1929057

Month Unknown        

image of Cirsium arvense, Canada Thistle, Field Thistle

Bruce Ackley, The Ohio State University, Bugwood.org    bug_5436742

Month Unknown        

Lower leaf surfaces are green, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.

image of Cirsium arvense, Canada Thistle, Field Thistle

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org    bug_5447376

Month Unknown        

image of Cirsium arvense, Canada Thistle, Field Thistle

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org    bug_5450403

Month Unknown        

image of Cirsium arvense, Canada Thistle, Field Thistle

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org    bug_5451379

Month Unknown        

Pappus tawny, plumose, per Vascular Flora of the Carolinas.

image of Cirsium arvense, Canada Thistle, Field Thistle

Rob Routledge, Sault College, Bugwood.org    bug_5515718

Month Unknown        

Involucres are smooth or, at most, have minute prickles on outer bracts, per Wildflowers of the Southern Mountains.


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

 

WEAKLEY'S FLORA (11/30/12):
Cirsium arvense   FAMILY Asteraceae__

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Cirsium arvense   FAMILY Asteraceae__

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-25-013:
Carduus arvensis   FAMILY Asteraceae__

 

Find by SCIENTIFIC NAME:

256

Forb
Perennial

Non-native: Europe

Habitat: Pastures, disturbed areas, per Weakley's Flora

map
NEW! Click here to see a map from Weakley's Flora of the Southeastern US showing range and abundance.

Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)


INVASIVE

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

 

IS THE PLANT "ARMED"?
Leaf margins spiny

LEAVES:
Simple: Lobed, unlobed and/or dissected
Alternate

FLOWER:
Summer/Fall
Disc: Purplish-pink
Rays: Absent
Bisexual
Inferior ovary

FRUIT:
Summer/Fall
Achene

 

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



 


Find by SCIENTIFIC NAME: