Family: Asteraceae
field sow-thistle, perennial sow-thistle
Keir Morse
Emmet J. Judziewicz
University of Wisconsin - Madison (WIS-VP)
Etymology: Sonchus: the Greek name for sowthistle
Plants: erect, perennial, 16"-60" tall forb with milky juice; stems hairless below the inflorescence; deep, creeping roots forming large patches
Leaves: alternate, edges prickly, lower leaves mostly pinnately-divided, upper leaves upper smaller, less divided and with heart-shaped bases clasping part way around the stem
Flowers: head 1 1/4"-2" wide with yellow ray flowers; inflorescence of several heads in open, branched clusters; blooms July-Oct.
Fruits: wrinkled, dry seed with 5 obvious ribs on each side
Habitat: disturbed sites
Conservation Status: Introduced - naturalized
Plants: erect, perennial, 16"-60" tall forb with milky juice; stems hairless below the inflorescence; deep, creeping roots forming large patches
Leaves: alternate, edges prickly, lower leaves mostly pinnately-divided, upper leaves upper smaller, less divided and with heart-shaped bases clasping part way around the stem
Flowers: head 1 1/4"-2" wide with yellow ray flowers; inflorescence of several heads in open, branched clusters; blooms July-Oct.
Fruits: wrinkled, dry seed with 5 obvious ribs on each side
Habitat: disturbed sites
Conservation Status: Introduced - naturalized
Flora of North America: Flora of North America Floristic Rating: Wetland Indicator = FAC- USDA Plants Database: Federal Distribution and detailed information including photos Dan Tenaglia's The Missouri Flora: Fabulous photographs; detailed descriptions; color and leave arrangement key. David G. Smith's "Delaware Wilflowers": Beautiful photographs; descriptions Illinois Wildflowers: Wonderful photographs; detailed descriptions; color and leaf arrangement key Southwest School of Botanical Medicine: Britton & Brown Illustrated Flora - 2nd Edition (1913) "An Illustrated Flora of the Northern United States and Canada"
Emmet J. Judziewicz
Emmet J. Judziewicz
Robert W. Freckmann
Christopher Noll
Kurt Stüber
Botanical Illustration
Botanical Illustration
Botanical Illustration
Botanical Illustration
Botanical Illustration
Aaron_Carlson
Aaron_Carlson
