Acorus gramineus

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Acorus gramineus
Acorus gramineus.jpg
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
Order: Acorales
Family: Acoraceae
Genus: Acorus
Species: A. gramineus
Binomial name
Acorus gramineus
Sol. Aiton, 1789

Acorus gramineus is a botanical species belonging to the genus Acorus.

Common Name[edit]

Dwarf sedge, Japanese rush, Japanese sweet flag


Native to Japan in eastern Asia, where it usually occurs in wetlands and shallow water.


This shrubby plant's long, narrow, slightly curved leaves may grow to 30 cm (12 inches) in height. It can grow fully or partially submerged, or in very moist soil, but it will usually only flower when at least partially submerged.

Var. pusillus has slightly shorter, more rigid glossy green leaves, while var. variegatus has longer leaves streaked with yellow.

Cultivation and uses[edit]

Acorus gramineus spreads aggrassively by rhizome, creating a nearly-seamless groundcover where conditions are favorable, and it is frequently used around the edges of ponds and water gardens,[1] as well as submerged in freshwater aquaria. It can be propagated by dividing the fleshy underwater rhizome and planting the base in shallow water.



  • Simon & Schuster's Guide to Freshwater and Marine Aquarium Fishes. New York, New York, United States: Simon & Schuster, Inc. 1976. ISBN 0-671-22809-9.