In newly-established rain garden on the causeway. I checked the tepals and they are acute, which separates this from the other redroot A. retroflexus. Don't get confused with the Alyssum flowers in the photo, or the other plants.
Thanks to a tip off from Jason I met Alternanthera nahui for the first time.
Same location as Jason's record: site as http://naturewatch.org.nz/observations/961856.
It is in a roadside ditch growing on the edge of raupo on one side of the road and with hawkbit and Plantago coronopus on the other.
peque?a flor, jard?n bot?nico
Is this... wild chard?
Abundant on mudflat of small coastal lagoon
aka "Oxybasis glauca subsp. ambigua" on NZPCN!
The Amaranthaceae, the Amaranth family, represent the most species-rich lineage within the flowering plant order of Caryophyllales. Now including the former goosefoot family (Chenopodiaceae), the extended family contains approximately 180 genera and 2,500 species.