December 2008 - Update of "Contacts", "Phylogeny conclusion" and "Published work" sections April 2008 - Update of more sections 15/3/2007 - John Hodgon changed his address 8/12/2006 - Included link to new publications 14/09/2004 - Updating of "Phylogeny conclusion" and including news from "Leaf and stem anatomy" to the section "Main topics of interest"