Spiny-leaved Sow Thistle
Spiny-leaved Sow Thistle
Sonchus asper
Daisy Family - Asteraceae
  Pathology Images Inc. 2002 2003
A tall plant (2 to 5 feet) with a loose, much branched flower cluster. Flower heads small (about wide), elongated, yellow and dandelion-like. Leaves alternate and lobed, with very spiny, toothed margins. Bases of leaves rounded and curled, enfolding the smooth reddish stem.
Photographed on the Maclean Road, Central Frontenac Township - late July