Cotyledons
Oval, fleshy

Roots
Rhizomes

Stem
Erect, branching near top
Hairless, hollow
Milky sap in stem

True Leaves
Alternate bright, shiny green
Upper leaves clasp stem
Irregularly lobed
Weak, prickly margins

Flowers
Yellow, resemble dandelion flowers

Habitat
Grain fields, cultivated fields,
pastures, roadsides

Note
Annual sow thistle very similar
but does not have underground rhizomes