Saxifraga can be annuals, biennials, evergreen or herbaceous perennials, mostly mat-forming in habit, with simple or palmately lobed leaves and starry or rounded flowers which may be solitary of in panicles or cymes
Porphyrion section saxifrages are compact, cushion or mat-forming evergreen perennials with small, usually lime-encrusted leaves, and 5-petalled white, yellow or pink flowers in early summer
'Peter Burrow' is an evergreen perennial forming a compact mound with rosettes of tiny, dark grey-green, awl-shaped leaves, becoming silvered in winter, and solitary pale purplish-pink flowers 2cm across, with orange anthers