Smooth Sow-thistle?

Smooth Sow-thistle?

Observation - Smooth Sow-thistle?. Description: Tall plant. Pale yellow flower. Milky if stem broken off. Auricles seem to be rounded but a few have points. May be S. asper?

Tall plant. Pale yellow flower. Milky if stem broken off. Auricles seem to be rounded but a few have points. May be S. asper?