twisted through 180 degrees
the flower is reversed by a 180' twist of the pedicel during development and holds the lip at the bottom and the dorsal sepal above
• (a.) Inverted in position; appearing to be upside down or reversed, as the flowers of the orchis and the leaves of some plants.
Inverted. In the Orchidaceae, many of the flowers are twisted through 180 degrees, so that the position of the upper and lower petals is reversed. An orchid flower which has the dorsal sepal above the lateral sepals and the labellum below the column.
In orchids, those plants whose flower lips are positioned lowermost relative to the inflorescence axis; the vast majority of orchid flowers are resupinate.
<botany> Twisted through 180 degrees, for example as with the ovary of most orchids. ... (10 Mar 1998) ... 
Re·su'pi·nate adjective [ Latin resupinatus , past participle of resupinare to bend back. See Resupine .] Inverted in position; appearing to be upside down or reversed, as the flowers of the orchis and the leaves of some plants. 
Upside down; turned over.
the flower is reversed by a 180' twist of the pedicel during development and holds the lip at the bottom and the dorsal sepal above
resupinate Inverted or seemingly turned upside down, as the flowers of most orchids.
refers to upside-down position of the flower caused by a twisting of the ovary or pedicel so that the column is above the labellum