BPH-2, a second edition of Botanico-Periodicum-Huntianum (1968), is an alphabetical title list of periodicals with botanical content. Spanning 1665 to 2002, BPH-2 includes more than 33,000 titles from around the world in agriculture, agronomy, bacteriology, biology, biotechnology, botanical bibliography and history, conservation, ecology, environmental science, floriculture, forestry, fruit growing, genetics and plant breeding, geography, horticulture, hydrobiology and limnology, immunology and toxicology, medical mycology, microbiology and microscopy, molecular biology, palaeontology, pharmacology and pharmacognosy, plant pathology and vegetable crops, etc. Each entry provides the title, subtitle, volume and date span, a standardized title abbreviation, and notice of former and subsequent titles where relevant. Over 8,000 cross-references facilitate searches. BPH-2 is intended for the use of workers in all the fields mentioned above, together with librarians, bibliographers, database managers, and publishers.