Scientific name

Juncus L.

Common names




Could be confused with

Acorus, Butomus, Carex, Cyperus, Eleocharis, Isoetes

Native distribution


Species commonly cultivated

Juncus bufonius L. (cosmopolitan)

J. canadensis J. Gay (North America)

J. effusus L. (Americas, Europe, Australia, New Zealand)

J. usitatus L.A.S. Johnson (Australia)

Adventive distribution

Juncus effusus is introduced into Australia.

Weed status

information not available

Brief description

Perennial or annual rush. Clump-forming and/or colonial. Stems terete or flattened, unbranched, bright green to dark gray. Leaves absent or alternate, narrow and flattened, capillary, or terete, occasionally sheathing at base, sheath base open, sometimes transversely septate. Inflorescence a cluster of cymes, often appearing paniculate, much branched. Flowers small; perianth of 6 tepals in 2 whorls, thin and scarious, green, brown or reddish. Fruit a capsule.

Natural habitat

all types of lowland water-bodies

Additional comments

Juncus, the true rushes, contains ca. 230 spp. worldwide, with some species cultivated for ponds.