Saxifraga ×arendsii Engl.

Forms spreading, suckering cushions. Flowers mostly 10-12 in flat-topped branching clusters, deep pink to purplish. (s. exarata × s. rosacea and others)

These are the mossy saxifrages quite widely grown in gardens.

Source: Spencer, R. (2002). Saxifragaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     [Saxifraganae]
order      Saxifragales
family       Saxifragaceae
genus        Saxifraga L.