mustard and cress
noun
Seedlings of white mustard (sometimes commercially replaced by rape seedlings, Brassica napus) and of cress (Lepidium sativum) used as a garnish and in salads. Frequently attributive.
- Sometimes grown in pots, baskets, etc., as an ornament..
Origin
Early 19th century; earliest use found in Robert Landor (1781–1869), writer.