New Nepenthes

As a supplementary volume to Pitcher Plants of the Old World, the book covers taxa documented since the publication of that work in 2009, including 18 new species, 2 revised species, 1 new variety, and 2 new incompletely diagnosed taxa. The book provides detailed accounts of all of these taxa, often in the format of its predecessor, and these are accompanied by expedition reports and formal species descriptions. The content is arranged in broad geographical categories.

Seven species are formally described as new: N. appendiculata and N. epiphytica from Borneo, N. ceciliae and N. pulchra from the Philippines, N. nigra and N. undulatifolia from Sulawesi, and N. monticola from New Guinea.[3] This last species had previously been confused with the ultrahighland N. lamii; its recognition as a distinct species necessitated the publication of a revised circumscription for N. lamii. The work also includes an emended description of N. thorelii, which was rediscovered in 2011 after more than 100 years.[1][4][5] Two "incompletely diagnosed taxa" are also included: N. sp. Anipahan and N. sp. Luzon (later described as N. aenigma).[6]

The book includes accounts of the discovery of all newly described species, as well as new populations of N. attenboroughii, N. holdenii, N. philippinensis and related taxa, N. pitopangii (previously known from a single plant), and an undiagnosed Nepenthes taxon from the Cardamom Mountains of Cambodia.[1]

With regard to future volumes, McPherson writes:[1]

Although this work addresses all new Nepenthes and novel observations relating to the genus discovered since 2009, it is specifically titled Volume One because continuing exploration is likely to reveal additional Nepenthes species, as well as information that adds to our understanding of the diversity, ecology and taxonomy of these complex and fascinating plants. When sufficient observations have been made, it is my intent to publish further New Nepenthes volumes as required.