More leafy and robust than the true native, and often arising from wildflower seed.  Leaves sharply toothed.  The fruits are usually  winged at the angles, and are often wrinkled.  Intermediates occur.  

Salad Burnet (true native speces) is a grassland speces of calcareous and occasionally neutral grasslands 

photographs of plant in situ; note habitat

roadside verges, new open spaces, waste ground, grasslands