Geranium × oxonianum

Geranium × oxonianum, the Oxford geranium, is a hybrid variety of flowering plant in the family Geraniaceae, which is a 1932 cross of garden origin between Geranium endressii and Geranium versicolor. Growing to tall by, it is a highly variable plant with round palmate leaves and often veined flowers in various shades of pink. It can be invasive.
Hardy down to or below, this tough plant is the source of several garden-worthy cultivars. The following have been given the Royal Horticultural Society's Award of Garden Merit:-

'A.T. Johnson'
'Beholder's Eye'
'Wageningen'