Sagina
A relative of Dianthus and Gypsophila, but even smaller, cushion-forming, spreading gently and making evergreen ground cover. Its simple nature means it could be used in Japanese-style gardens.
Although visited by flies and other insects, the flowers of Sagina are small and don’t constitute a huge resource for pollinators. However the creeping growth of perennial species helps conserve water and provides refuge for soil invertebrates in a rocky garden, as well as helping blur the mind-numbing straight lines we attempt to impose upon Nature.