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

Flower head has a single dense cluster or, rarely, two clusters

Trevor James, AgResearch

Right: stems are dull and ridged, with a modified, expanded leaf (bract) behind the flower head. Found in damp pasture or swamp margins. Juncus conglomeratus. [PDF 429 KB]