Hi Sally and Peter. Interesting, initially I thought this could be D. aequalis, although the shape of the flower doesn't look right. I consulted with Tobias, and he thinks the same. Given they are in a patch of D. partina, I suspect they are a yellow form of D. pardina, which I have seen previously at Mulligans Flat. Nice find.
Hi Sally and Peter, I'm the Species Project Coordinator for Diuris aequalis working for the Office of Environment and Heritage in the Saving our Species program. I agree with Tony in that it looks a little different to D. aequalis (but there are also some similarities that make this record interesting). Also, D. aequalis normally flowers a little later in the year. I'm wondering if this record might be a hybrid between D. aequalis and another sympatric Diuris species. Do you recall if there were any other Diuris flowering at this site?
I'd be really keen to have a look at this population. Do you have any more details of the site? If you do, or you would like to discuss this further, you can email me at: buttercup.doubletail@environment.nsw.gov.au.
Kind regards, Anna Murphy Project Officer Threatened Species (Saving our Species) Office of Environment and Heritage, Queanbeyan.