Flora of New Zealand Series

Perennial grass-like tufts to c. 30 cm high. Leaves < stems, to 8 mm wide, channelled. Inflorescence usually a many-flowered dense globose head subtended by 1-3 longer leafy bracts. Stamens 6. Capsule c. 3 mm long, ± = tepals, ovoid, mucronate, red-brown.

N., S. Local in lowland swamps or brackish ground. (Australia)

Resembles J. planifolius in the grassy habit, but differs in the channelled leaves and compact globose heads.

Locally a nuisance, as in parts of the Canterbury Plains, as a common weed on banks of drains and water races.