Hypochaeris radicata - Cat's-ear
This is a common weed of lawns because the flat central rosette survives mowing.
The leaves are bristly- hairy and wavy-lobed with broad blunt end - a cat’s ear.
There are no leaves on the stem - just green scales. The stems enlarge just below the flower. The stem is either unbranched or branched up to twice.
Flowers are single. Bracts often have a white stripe up the middle and a ‘cocks-comb’ of stiff hairs near the tip.