Kirk's Bush, near Papakura, Auckland.
On poroporo, at bush margin with Southern Park.
Found in a freshwater pond. With many others
Unsure - labellum appears triangular but not entirely smooth margin. M. unifolia growing reasonably close but I thought this plant looked quite distinct; at earlier floral development than surrounding M. unifolia, most of which are beginning to fruit
Common on seepages and in drains along roadside and above river.
Growing in the garden verge in Central Taupō