Polygala paucifolia
Little bog plant with pinkish purple flowers in June. Flowers have 3 petals, the middle one of which is fringed at the end (hence its common name - Fringed Milkwort). Often found on wooded, damp slopes.
Leaves are glossy green, some of which with a bit of reddish-brown colouring.
Height of only 3" or 4"