The Pan-Himalayas (the Himalayas and adjacent regions) forms a natural geographic unit, from the Wakhan Corridor and northeastern Hindu Kush eastwards to the Hengduan Mountains via Karakorum and the Himalayas. This region covers the northeastern corner of Afghanistan, northern Pakistan, northern India, Nepal, Bhutan, northern Myanmar, and southwest China (S Tibet, SE Qinghai, SE Gansu, W Sichuan and NW Yunnan). The Flora of Pan-Himalaya will be published in 50 volumes (ca. 80 books), with large families divided into two to seven parts. The publication schedule will be based on the availability of manuscripts. The classification systems used in this Flora will reflect current understanding of phylogenetic relationships of the plant groups. The APG III system will be adopted for angiosperms, and up-to-date phylogenetic systems of gymnosperms, ferns and lycophytes will also be reflected in treating these groups.-- Supplied by publisher.