Current framework of rosid phylogeny is displayed as a big tree with sturdy trunk and wide-spreading branches. A series of snapshots of flowers or fruits are displayed on the top of each clade, reflecting their morphological characters and economic importance. Different colors represent 17 orders of Rosidae
. The super-ordinal relationships within Rosidae
are outlined, sketching out a basic structure of the tree trunk (please see Sun et al., pp. 363–391 in this issue). This cover image shapes like a fan in Chinese painting, attempting to reflect that this special issue is a major regional effort toward the whole tree of life project.