@RobG1 Looking at the curve and the flaring at the edges of the dorsal sepal, I don't feel like this ID is correct. Perhaps a hybrid. I don't think it is Pterostylis coccina/Diplodium coccinum.
@Csteele4 Hi Tina, the flower was large and the sinus was rough (scabrous), unlike D decurvum. The base of the galea was more bulbous (or inflated) than D decurvum. There was a more shrivelled D coccinum in the same colony. Jean Egan and Derek Corrigan were also present when we found this flower and agreed it was D coccinum. I just think the flower was beginning to contort and collapse with age.