(Senecio vulgaris): Sunflower family; winter annual; seed leaves narrow,
with blunt narrow tip; first true leaves with shallow teeth; third and fourth
leaves more deeply lobed.
(Sonchus oleraceus): Sunflower family; summer annual; seed leaves markedly
stalked, almost spoon-shaped, rounded at tip and often have grayish powdery bloom.
(Amsinckia spp.): Borage family; winter annual; Y-shaped seed leaves with
tiny blisters and a few fine hairs; early leaves with coarse, sharp hairs, and
4 to 6 times longer than wide.