History of botany scope of the subject as technology has opened up new techniques and areas of study. Modern molecular systematics, for example, entails the principles and techniques of taxonomy, molecular biology, computer science and more. Within botany there are a number of sub-disciplines that focus on particular plant groups, each with their own range of related studies (anatomy, morphology etc.). Included here are: phycology (algae), pteridology (ferns), bryology (mosses and liverworts) and palaeobotany (fossil plants) and their histories are treated elsewhere (see side bar). To this list can be added mycology, the study of fungi, which were once treated as plants, but
Pitcher Plants of the Old World M. Christenhusz and Michael F. Fay wrote: This is to date the only publication dealing with the genus "Nepenthes" throughout its geographical range. He [McPherson] humbly refers the reader to other taxonomic works, but these are all regional treatments. The level of information provided on all the species of "Nepenthes" is outstanding and has no precedent. Pitcher Plants of the Old World Pitcher Plants of the Old World is a two-volume monograph by Stewart McPherson on the pitcher plants of the genera "Nepenthes" and "Cephalotus". It was published in May 2009 by Redfern Natural History Productions and covers all species