This looks closest in the Petalochilus group in the Shoalhaven orchid book, except for the bright orange tip of the labellum. The comment in that book was that this species is more restricted to coastal areas to coastal areas of scrub and forest in well drained sandy soil.
My first thought was actually Caladenia alata, but it does not look much like the photo in the Shoalhaven book, and in particular the photo in the Shoalhaven book does not show the distinctive bright tip to the labellum. However both the sightings of alata on ALBC show this character. When I checked in the David Jones ‘Native Orchids of Australia’ book this character was in the description. However, his diagnostic for alata was ‘midlobe orange with two flat orange glands at the base. The two flat glands are there but the midlobe is not orange. David Jones’s diagnostic for hillmanii is ‘midlobe broad, dark red to purple with darker bars, midlobe with single pair of large flat yellow teeth’. So it does not quite fit either?
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