Phylogeny of Ehrhartoideae, created by grafting the phylogeny of Ehrharteae (unshaded box) from Verboom et al. (2003) onto that of Oryzeae (gray box) from Ge et al. (1999) and Guo and Ge (2005). Polyploid members of Oryzeae are placed to the right of the diploid species according to their genomic constitution. Changes in major morphological characters mapped on to the tree using MacClade 4.0 (Maddison and Maddison 2005).