Pink wild flower for ID please

Pink wild flower for ID please

Observation - Pink wild flower for ID please - UK and Ireland. Description: Looks like I've missed the best of this one.Chalky hillside and growing by the track in full sun. Interesting because some of the flower heads seem to be growing from part way down the stem and not at the end of it. Thanks for looking.

Looks like I've missed the best of this one.Chalky hillside and growing by the track in full sun. Interesting because some of the flower heads seem to be growing from part way down the stem and not at the end of it. Thanks for looking.