column

noun

(L. columna: column) The lower part of an awn in grasses, when distinctly different in form from the upper part; structure in Orchidaceae, Asclepiadaceae and Stylidiaceae, extending above the ovary of a flower and incorporating stigma, style and stamens (gynostemium). The plant structure that supports the lid of a pitcher-plant.
In an anemone, the cylindrical outer wall above the pedal disk and below the tentacles and oral disk.