Colour variation in Marsh Thistle

Colour variation in Marsh Thistle

Observation - Colour variation in Marsh Thistle - UK and Ireland. Description: On the same day as Elouise was recording https://www.ispotnature.org/communities/uk-and-ireland/view

On the same day as Elouise was recording https://www.ispotnature.org/communities/uk-and-ireland/view/observation/805312/white-marsh-thistle I found a fiels with a wide range of colour variation - ? backcrosses between white and purple (anyone know?)