The dainty, lilac blooms of the field scabious can be seen between July and September. The pom-pom like flowers bob around on the end of long stalks.
It's no surprise that field scabious are found in such large numbers on the Commons. It loves dry, well-drained calcareous grassland.
Lots of bees, butterflies, moths and hoverflies are attracted to the flowers in summer. It's an important source of nectar for the many insects that live on the Commons.