On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Stem ridges are not distinct, and base sheaths are golden to dark straw brown

Kerry Bodmin, NIWA / Bush Heritage Australia / Paul Champion, NIWA

Right: stems are grey-green, and flowers are solitary or clustered. Found in damp pasture or swamp margins. Juncus polyanthemus. [PDF 426 KB]