Mainly found in the south, south-west and west of Ireland, and one or two northern locations such as Rathlin Island, this is a perennial sub-species of Calystegia sepium which is predominantly found in coastal regions. It twines its way across other plants and across hedgerows to a height of 2-3 metres. It has softly pink, trumpet-shaped flowers (5cm across) which have five white stripes leading into the centre.The epicalyx bracts only overlap a little, if at all. The stems, leaf-stalks and flower-stalks are sparsely hairy. The leaves are arrow-shaped. This subspecies blooms from June to September.
I found this subspecies growing near Clonbur on the shores of Lough Corrib in Co Galway in July 2014 when I also photographed it.
If you are satisfied you have correctly identified this plant, please submit your sighting to the National Biodiversity Data Centre