Thelymitra reflexa, commonly called the reflexed sun orchid, is a species of orchid that is endemic to Victoria. It has a single erect, fleshy, channelled leaf and up to six bluish purple flowers. The sepals and petals are strongly turned back towards the ovary but only on hot days when the flowers open.
Thelymitra reflexa is a tuberous, perennial herb with a single erect, fleshy, channelled, linear to lance-shaped leaf NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide with a purplish base. Up to six bluish purple flowers NaNsigfig=1NaNsigfig=1 wide are arranged on a flowering stem NaNsigfig=1NaNsigfig=1 tall. The sepals and petals are NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide and turned strongly back towards the ovary. The column is pink or purplish, NaNsigfig=2NaNsigfig=2 long and NaNsigfig=1NaNsigfig=1 wide. The lobe on the top of the anther is dark blackish green, gently curved and deeply notched. The side lobes curve upwards and have mop-like tufts of white, sometimes pink hairs. Flowering occurs in October and November but the flowers are self-pollinating and only open widely on hot days.[1] [2] [3]
Thelymitra reflexa was first formally described in 2005 by Jeff Jeanes and the description was published in Muelleria from a specimen collected near Crib Point.[4] The specific epithet (reflexa) is a Latin word meaning "bent or turned back"[5] referring to the strongly reflexed sepals and petals, although the flower only open on very hot days.
The reflexed sun orchid grows in heathy woodland but is only known from the Mornington Peninsula and French Island.