The Linear Angiosperm Phylogeny Group (LAPG) III: a linear sequence of the families

Journal of the Linnean Society 161: 128–131) has resulted in the need for a revised systematic listing of the accepted families. This linear APG III (LAPG III) sequence of families is presented here. © 2009 The Linnean Society of London, Botanical Journal of the Linnean Society, 2009, 161, 128–131. ADDITIONAL KEYWORDS: angiosperm classification – family arrangement – floras – herbarium curation. Linear sequences of families are required for herbarium curators who wish to arrange collections systematically rather than alphabetically, and there are currently a wide range of systems in use. Over time, in most herbaria, as the understanding of rela-tionships changed, these classifications have become outdated and no longer represent the best estimate of relationships. Curators have updated these systems, usually by adding suffixes or making composite numbers such as ‘145a ’ or ‘145.01 ’ to incorporate changes in an existing sequence. In many cases