World Flora: Catalogue of 400,000 plant species to be online by 2020   St. Louis,Missouri, USA: according to a report, some leading botanical institutions will collaborate over creating a catalog of every plant on the globe, with plans to make the inventory of at least 400,000 species available for free online by 2020. Plans for the catalog called the World Flora were announced Monday by the St. Louis-based Missouri Botanical Garden, New York Botanical Garden and two British institutions, the Royal Botanic Garden Edinburgh and Royal Botanic Gardens, Kew. They will compile scientific...