Spiny-leaved Sow Thistle

A tall plant (2 to 5 feet) with a loose, much branched flower cluster. Flower heads small (about ź 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