Which plant family contains the Albany pitcher plant as its only living species?

The Albany pitcher plant belongs to the plant family Cephalotaceae, which contains only that one living species. Its scientific name is Cephalotus follicularis, and both the genus Cephalotus and the family Cephalotaceae are monotypic.

This small carnivorous herb is native to peaty wetlands in southwestern Western Australia, especially around the coastal region northeast of Albany. Its modified leaves form squat, lidded pitchers that trap insects in digestive fluid. The lid helps keep rain from diluting the fluid, while the pitcher rim makes escape difficult.

Cephalotaceae is easy to confuse with the better-known pitcher-plant families Nepenthaceae and Sarraceniaceae, but the resemblance is an example of convergent evolution rather than close relationship. Robert Brown recognized the plant's distinctiveness, and Dumortier formally placed it in its own family in 1829. Living specimens reached Kew Gardens in 1823, helping make the species a famous cultivated carnivore.