[caley-ann-er]
Named in honour of George Caley, an early collector of New South Wales plants. Sometimes called Caleyana.
An Australian genus closely related to Drakaea, but readily distinguished from it by the wide wings of the column forming a kind of pouch open or closed by the movements of the irritable lid-like lip, which acts as a trap for insects forced against the column by the spring of the lip. Ovary usually recurved, reversing the flower. Fertilised by struggling insects that are caught and held.

C. nigrita, Lindley; dark.
"Lady's slipper orchid"
A small plant with a radical ovate leaf. Stem about 6 in. high. Flower reversed, usually solitary, reddish-brown to deep purple, on stalk of 0.5 to 1 in. Segments of the perianth narrow-linear. Lateral sepals incurved and appressed against the dilated wings of the column. Upper sepals incurved and appressed against the back of the column. Petals narrow at base, then spathulate, appressed against column wings. Lip on a springy claw, lobed. Column yellowish green, wings forming a boat-shaped pouch. Often found associated with Drakaea elastica.
W.A.: Boyup Brook, Collie, Maida Vale, Peel Estate.