passe-pierre
/ˌpaspɪˈɛː/ /ˌpaspjɛː/noun
Any of several herbaceous plants that grow on bare or rocky ground, including rock samphire, Crithmum maritimum, and (formerly) parsley piert, Aphanes arvensis.
Origin
Late 16th century; earliest use found in Household Books James VI & Anne. From Middle French passe-pierre rock samphire, saxifrage (although this is first attested slightly later: 1615) from passe- + pierre stone.