Thelymitra stellata, magnifica, dedmaniarum
Star Orchid and related
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This group consists of four closely related orchids. T. stellata, T. aff stellata, T. jacksonii and T. dedmaniarum. The first three species are similar and differ mainly in flower size and flowing period. None of the species featured here are very widespread.
Note: Thelymitra aff stellata has been given an official name - Thelymitra magnifica
An interesting note is that I checked T .magnifica (Crystal Brook) at about 11.30 at night and found the flowers open!

Thelymitra magnifica
Crystal Brook Star Orchid

Thelymitra magnifica
Crystal Brook Star Orchid

Thelymitra magnifica
Crystal Brook Star Orchid

Thelymitra stellata
Star Orchid

Thelymitra stellata
Showing entire plant

Thelymitra stellata
Star Orchid

Thelymitra dedmaniarum
Bronze Orchid

Thelymitra dedmaniarum
Bronze Orchid

Thelymitra dedmaniarum
Bronze Orchid

Thelymitra dedmaniarum
Bronze Orchid

Thelymitra jacksonii
Jackson's Sun Orchid

Thelymitra jacksonii
Jackson's Sun Orchid

T. magnifica (Crystal Brook Star) differs from T stellata by having larger flowers (4-5cm vs 2-4cm) and a flowering period 2-3 weeks earlier. T. jacksonii has large flowers (5-6cm) and an even later flowering period around late November to December.
T. dedmaniarum has lighter flowers and a consistant light stripe on each petal and sepal.