unknown cliff top plant

unknown cliff top plant

Observation - unknown cliff top plant. Description: Found in disturbed ground on cliff top, Ramsey Island. The plant on the right was identified by a warden as Marsh Pennywort - the ground can be quite wet. What is the plant on the left which is about to flower?

Found in disturbed ground on cliff top, Ramsey Island. The plant on the right was identified by a warden as Marsh Pennywort - the ground can be quite wet. What is the plant on the left which is about to flower?