definition
Any of more than 500 species of flowering plants of the genus Polygala that are used as a food source by the larvae of some members of the Lepidoptera order.
Richer grasslands may include common milkwort, salad burnet, wild thyme and common rock rose.
It is almost certainly the common milkwort, Polygala vulgaris.
Milkwort (Polygala) - The hardy Milkworts are neat dwarf plants, with flowers much resembling those of the Pea family.
P. Chamaebuxus (Box-leaved Milkwort) is a little creeping shrub from the Alps of Austria and Switzerland, where it often remains quite tiny.
Bright blue milkwort and yellow Horseshoe Vetch bedecking the downland slopes.
Occasional splashes of color come from tormentil, heath milkwort, devil's matchsticks or silver-studded blue butterfly.