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
Ligulatae section saxifrages are evergreen perennials forming monocarpic rosettes, usually clustered, of narrowly strap-shaped or oblong, lime-encrusted leaves, with sprays of small white, pale yellow or pink flowers in late spring or early summer
S. callosa is an evergreen perennial with rosettes of linear, lime-encrusted silvery-grey leaves to 8cm in length. Starry white flowers 1cm in width are carried in large open panicles on arching stems to 25cm