Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA (11/30/12):
Cirsium arvense
FAMILY
Asteraceae__
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Read more about Canada Thistle at Vascular Plants of North Carolina.
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.
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.
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.
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org bug_5451379
Month Unknown
Pappus tawny, plumose, per Vascular Flora of the Carolinas.
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.
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__