Observed above water level in lake but water level was lower than usual so it could have been submerged previously.
One plant, growing in damp gully draining fellfield
Leaves rather rigid, not soft like C. spectabilis. Could it be C. spectabilis x C. semicordata? Lots of C. spectabilis nearby but no C. semicordata on a quick search.
@janegosden
Not sure about this. Is it the leaves of the Lobelia ionantha?
In a kettlehole.
In stonefield on stable riverbed.
Growing on the edge of Lake Rotoroa in area occasionally inundated.