[1] It was originally published in the Bulletin du Jardin Botanique de Buitenzorg in 1928,[1] and reprinted by Natural History Publications (Borneo) in 2006.

Danser synonymised N. edwardsiana with N. villosa, N. hemsleyana with N. rafflesiana, and N. ramispina with N. gracillima;[1][6] all three were later reinstated as valid species.

Charles Clarke writes that Danser's monograph "remains the definitive taxonomic work on Nepenthes"[3] and explains its importance as follows:[5] The discoveries of the early 20th century were brought together by Danser and neatly integrated to shed light on many of the unsolved problems of Macfarlane's monograph.

He speculated about the relationships between certain species on the basis of their evolution and ecology as much as their structural characteristics–something that nobody had done previously.Danser's monograph was reprinted by Natural History Publications (Borneo) in April 2006 with a 15-page introduction by ecologist and botanist Charles Clarke.

[10] The 2006 reprint was reviewed by Barry Rice in the September 2007 issue of the Carnivorous Plant Newsletter:[11] Having a high quality copy of the work is very desirable so you can easily cross reference its contents with subsequent Nepenthes monographs.