[4] Six taxa are also covered under "dubious species and erroneous records": N. alata, N. gymnamphora, N. macfarlanei, and N. maxima (which are all shown to be absent from the island); N. sp.

Clarke makes only two major revisions: restoring N. faizaliana as a distinct species and sinking N. borneensis in synonymy with N. boschiana.

[1][7] In the book's preface, Clarke writes:[1] My aim is to provide a balanced, first-hand account of the plants in an ecological context, partly based on the research I performed on them in Brunei in 1989 and 1990.

This information is intended to complement the recent taxonomic revision of Nepenthes by M. Jebb and M. Cheek.The following taxa are covered in the book, with 31 recognised as valid species.

Barry Meyers-Rice reviewed Nepenthes of Borneo in the December 1998 issue of the Carnivorous Plant Newsletter.