Saxifraga callosa, the limestone saxifrage, is a species of flowering plant in the family Saxifragaceae, that is native to maritime alpine habitats in Western Europe (Italy, France and Spain). Growing to 50 cm (20 in) tall by 100 cm (39 in) broad, it is a clump-forming evergreen perennial with rosettes of narrow grey-green leaves that are coated in lime. The starry, pure white flowers are borne in long panicles in spring.
The Latin specific epithet callosa means “thick-skinned, with calluses”.
Saxifraga ...