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perennial marsh plant having swordlike leaves and aromatic roots

: a perennial marsh herb (Acorus calamus) having long leaves and a pungent rootstock — called also calamus

a plant, Acorus calamus, of the arum family, having long, sword-shaped leaves and a pungent, aromatic rootstock. Also called sweet calamus.

[1775-85]

sweet flag noun

An aromatic araceous pond-plant (Acorus calamus)

Main Entry: ↑sweet

sweet flag,

1. a water plant with long, sword-shaped leaves and a thick, creeping rootstock; calamus; sweetroot. It belongs to the arum family.

2. its fragrant root, used in perfumes and medicines and sometimes preserved with sugar and eaten as candy.

(also sweetflag) n. an Old World waterside plant of the arum family, with leaves that resemble those of the iris. It is used medicinally and as a flavoring. Also called calamus. ● Acorus calamus, family Araceae