stone cress
noun
Any of several low-growing plants which grow on stony ground; especially (in early use) †the rock cress Arabidopsis petraea ( obsolete ), and (in later use) any plant of the Mediterranean genus Aethionema (family Brassicaceae (Cruciferae)), commonly cultivated in rock gardens.
Origin
Late 16th century; earliest use found in John Gerard (c1545–1612), herbalist.