This book provides botanists in the region with the means to assemble complex information on Brazilian plant diversity. Nine thousand and sixty-six specimens were examined and 869 species are recorded in 135 genera, and duplicates lodged in Kew and at other herbaria can be checked against the correct determination. The database that underpins this checklist is available on the Internet at (http://www.rbgkew.org.uk/data/repatbr/homepage. html).