Definition of marsh rosemary in US English:

marsh rosemary

noun

  • 1Marsh andromeda.

  • 2US a kind of sea lavender, Limonium carolinianum, with an astringent root.

  • 3Marsh tea, Ledum palustre.

Origin

Late 18th century; earliest use found in John Lightfoot (1735–1788), Church of England clergyman and naturalist.